Why was Li Shimin the first emperor of Qin Shihuang?

The landlord is so funny. In the Tang Dynasty, Li Shimin, Emperor Taizong, was named King of Qin.

Tang Gaozu Li Yuan, Li Shimin's father, replaced the tyrant emperor Yang Di (after the emperor Yang Di, there were two puppet emperors in the Sui Dynasty, which was too short and had limited influence, so it was ignored).

Emperor Yang Di (Yang Guang)

Yang Di, the second son of Emperor Wendi of Sui Dynasty, was named Yang Guang (569-6 18). He succeeded to the throne after killing Wendi Deng and his brother Yong Yang. 14 years, besieged by the peasant uprising wave in Jiangdu (now Yangzhou City, Jiangsu Province), launched a mutiny for Yu Wenhuaji and others. At the age of 50, he was buried in the northwest of Yangzhou City, Jiangsu Province 15 Tang Lei.

Emperor Yang Di Yang Guang, also known as Angelababy and Amo, was made King of Jin in 58 1 year. In the process of destroying southern Chen and resisting northern Turkistan, he made great contributions and recruited a group of talents, bent on replacing his brother as the prince. Due to the luxury of life, Yong Yang gradually lost the favor of Emperor Wen of Sui Dynasty. Yang Guang catered to Emperor Wen's wishes, advocated frugality, pretended to be frugal and behaved indecent. Whenever Wendi came to his mansion, he locked his concubines in the back room. In the mansion, only a few old and ugly women were arranged, dressed in coarse clothes, waiting around. He deliberately broke the musical instrument and made it covered in dust. Put it in a conspicuous position. Wendi Deng thinks that Yang Guangxiang is like himself, and he is very satisfied. On one occasion, Yang Guang went out hunting and it rained heavily. The guard brought him a greasy coat (raincoat).

He refused, saying, "The soldiers were soaked in the heavy rain. Can I wear them alone to shelter from the rain? " Wendi thinks that Yang Guang still has a kind heart and he can achieve great things in the future. At the same time, Yang Guang colluded with Su Yang, the King of Yue who was at odds with Yong Yang, trying to discredit Yong Yang in front of Wendi and Queen Dugu, and framed Yong Yang during Wendi's illness, saying that he hoped his father would die at an early date. Hearing this, Emperor Wendi arrested Yong Yang, who was abolished as Shu Ren in 600 AD and made Yang Guang a prince. The first step of Yang Guang's usurpation was successful.

In July 604, Wendi was seriously ill in bed. Yang Guang thinks it's time to ascend the throne. He can't wait to write to Su Yang and ask how to deal with the upcoming funeral of Emperor Wen. Unexpectedly, the messenger sent Su Yang's reply to Wendi Deng by mistake. Emperor Wen was furious after reading it. He immediately called Yang Guang to the palace and questioned him face to face. At this time, Mrs. Xuanhua came in in untidy clothes, crying that Yang Guang had shamelessly molested her while she was changing clothes, which made Wendi more aware that he had been cheated by Yang Guang, patting the bed and cursing: "This beast is so rude, how can he take on the responsibility of governing the country?" The queen missed my big event. " Urgent to serve in Liu Shu, Yan Yuan wrote, abolished Yang Guang, made Yong Yang prince. Yang Guang got a tip-off from his minions who were placed beside Wendi Deng. After consulting with Minister Su Yang, he led troops to surround the palace, drove away the imperial secretary, arrested Liu Shu and Yan Yuan, and murdered Wendi. Yang Guangpa sent someone to forge the Biography of Emperor Wen's Wills, demanding that Yong Yang commit suicide. Before Yong Yang could answer, the sent men dragged Yong Yang out and killed him. In this way, Yang Guang seized the throne by killing his father and brother. History is called Yang-ti. In the second year, the title was changed to "Daye".

As soon as Yang Guang ascended the throne, he showed the nature of being extravagant and harming the people, and became a famous prodigal son and tyrant in the history of China.

In the first year of his accession to the throne, Yang Guang decided to move the capital to Luoyang. He ordered Su Yang to build Tokyo Palace and Yuwen Kai and Feng Deyi to build Ren Xian Palace. 2 million people are employed to build Luoyang every month. It also collects rare materials and stones from all over the country and transports them to Luoyang. Farmers are forced to transport for thousands of miles, which makes many people exhausted on the road. He ordered the construction of the West Garden in the western suburbs of Luoyang, covering an area of more than 200 mu. There are three fairy islands in the sea, which are 100 feet high. The buildings on the island are very spectacular. There is a Changlin Canal to the north of the sea. Canal water winds into the sea, and 16 individual courtyards are built along the canal. The building is very gorgeous, and each courtyard is headed by a concubine. The whole Xiyuan is like spring all the year round. In autumn, colorful silk is cut into leaves and covered with branches. In winter, when Yang Guang goes to the Palace, the ice in the pond must be quickly chiseled off, cut into lotus leaves with colored silk and placed on the floor. There are all kinds of rare birds and animals in the garden for Yang Guang to hunt and watch. In the evening, Yang Guang often takes thousands of ladies-in-waiting to ride horses and play music, and goes to the West Park for sightseeing and feasting.

In the same year, in order to exert and strengthen his rule in the south, Yang Guang recruited more than one million migrant workers. It took six years to build a Grand Canal with a total length of more than 4,000 miles from Zhuo Jun in the northeast (now Zhuoxian County, Hebei Province) to Suzhou and Hangzhou in the southeast. Avenue is opened on both sides of the river, elms and willows are planted along the roadside, and a palace for Yang Guang to rest is set up every two post stations on the shore. From Luoyang to Jiangdu (now Yangzhou City, Jiangsu Province), * * * has set up more than 40 palaces. It took about10.5 billion workers to dig the Grand Canal. At that time, an average of nearly 20 workers were needed for each household, and many migrant workers digging ditches were exhausted in the river. One section of the river was dug very shallow, and Yang Guang ordered all the officials who dug this section to be tied up with more than 50 thousand migrant workers and buried alive on the shore. Objectively speaking, this grand canal, built with the sweat and sweat of countless working people, plays an important role in facilitating north-south transportation, promoting economic and cultural exchanges between the north and the south, and being conducive to national reunification.

From August of the first year of Daye (AD 605), Yang Guang made three voyages to Jiangdu through the Grand Canal. The big dragon boat he rides is 200 feet long and 45 feet high, with four floors up and down. The accompanying concubines, princes and monks and nuns took thousands of magnificent ships, end to end, stretching for more than 200 miles. There are more than 80,000 trackers pulling the boat, and there are cavalry escorts on both sides of the strait. The flag covers the sun and it is very lively. At night, the lights are bright and the drums are loud. Yang guang indulged in drinking and enjoyed the scenery on both sides of the strait. People within 500 miles along the way were forced to provide food. When you can't finish eating precious and delicious food, you dig a hole while sailing. Many people were destroyed.

One year, Yang Guang went north by land and took 500,000 troops to recruit migrant workers from more than a dozen counties. Dig Taihang Mountain and build roads. In order to protect his safety, more than one million people were recruited to build the Great Wall in 20 days. When he arrived in the north, there was no palace there. He ordered Yuwen Kai, a skilled craftsman, to build a movable palace called Guan Fengxing Hall. It can accommodate hundreds of people, can be assembled and disassembled at any time, and the wheels can rotate below.

Yang Guang waged three wars against Korea. On the Korean peninsula, the strongest in the Sui Dynasty were Korea, Baekje and Silla. After Yang-ti succeeded to the throne, it was impossible to recruit the king of Korea into the DPRK, and Yang-ti led the army to conquer it.

In the eighth year of Daye (AD 6 12), Yang Guang conquered for the first time. Before sending troops, he collected a large number of craftsmen to build large ships in Donglai Haikou (now Ye County, Shandong Province). Artisans were forced to work day and night in the water, maggots were born below the waist, and three or four out of ten died. He also recruited migrant workers and ships to the south of Jianghuai, and transported grain from Liyang warehouse and Luokou warehouse to Zhuo Jun. Ship after ship, which lasted more than 1000 miles. There are often hundreds of migrant workers and soldiers running on the road. Many people fell dead on the side of the road, and the bodies smelled bad. After getting ready, Sui Jun1100,000 people attacked North Korea by sea and land, and only 2,700 people fled back. In the first month of the ninth year of the Great Cause, Yang Guang conquered Korea for the second time, and in April Yang Di crossed the Liaohe River again. In June, Hsuan Yang began to attack Luoyang, and Yang-ti had to retreat for fear. In the decade of Great Cause (AD 6 14), domestic peasant uprisings swept across the country. Yang-ti wanted to win the world and reverse the fate of peril. Conquered Korea for the third time. But at that time, peasant rebels were everywhere, and the recruited soldiers could not reach because of the impassable roads; Or run all the way. As a result, not enough people marched, so we had to make peace with North Korea and retreat.

At the same time, in order to show the prosperity of the Sui Dynasty, Yang Guang lured envoys and businessmen from the western regions into the DPRK, and the counties and counties along the way were ordered to spend huge sums of money to see them off. In 6 10, envoys and businessmen from various countries in the western regions gathered in Luoyang. From the 15th night of the first month, Yang Guang ordered a large theater to be built on the street outside Duanmen. The theater was 5,000 steps around and there were as many musicians as18,000 people. Music can be heard dozens of miles away, and the lights are as bright as day, playing until the end of the month. People from the western region went to the eastern city of Luoyang to do business. Yang Guang ordered the businessmen in this city to decorate the city and accumulate precious goods. Businessmen are all dressed in gorgeous clothes, and even the vegetable sellers in the stalls have to use dragon whiskers to lay the floor. When people from the western regions pass by the wine and food shops, the shopkeepers ask them to sit down, eat and drink for free. He also said that the Sui Dynasty was rich, and wine and food didn't spend money as usual. The trees in the city are also decorated with silk to show their wealth. The westerners asked, "You also had naked poor people in the Sui Dynasty. Why not use these silks to make clothes for them, but use them to wrap trees for nothing? " People in the city are speechless. In this way, the huge wealth and people's strength accumulated during the period of Emperor Wendi of Sui Dynasty were squandered and consumed endlessly by Yang Guang. Endless corvee and military service forced thousands of farmers in Qian Qian to leave their homes. A large number of fields were deserted, and farmers could not live, so they had to eat bark and leaves, and even the tragedy of cannibalism occurred.

Yang guang has neither faith nor faith. In 6 15, he went to the northern border again. Hundreds of thousands of Turkish cavalry suddenly attacked and besieged him in Yanmen (now Dai Xiao County, Shaanxi Province). He can only take his youngest son, Levin, crying day and night, helpless. Finally, he accepted the suggestion of Su Wei and others, issued an imperial edict, promised not to send troops to attack Korea again, and offered a reward for recruiting soldiers. County magistrates from all over the country subscribed in succession and led the troops to ask for help before he was rescued. However, after he returned to Luoyang, he broke his promise, refused to give him a reward, and ordered another attack on North Korea.

Yang Guang's tyranny finally aroused the peasant uprising. However, Yang Guang still refused to restrain himself, remained extravagant and cruel, and refused the suggestions of his officials. He thought he was brilliant and said to his courtiers, "People say I just inherited my predecessor's legacy. In fact, even if I am more talented than a scholar-bureaucrat, I should be an emperor. " He added, "I don't like being lectured by nature. If they are dignitaries and want to gain fame by remonstrating, I will spare them. If it is an ordinary person, I can spare him some, but I will never let him have a future. " Gao Ying, He Ruobi and Yu Wenbi, the founding heroes, were executed by Yang-ti for libel because they were dissatisfied with the extravagance of Yang-ti. In 6 16 AD, he visited Jiangdu again, regardless of the safety of the Sui Dynasty. When he was about to leave, Cui Xiangmin, a small official, went to the table to protest and killed him. When he went to Xishui (now Xingyang County, Henan Province), Wang Airen, a small official, went to the table to remonstrate. He killed Wang Airen and moved on. In Du Liang (now Kaifeng, Henan), someone blocked the way and wrote a letter saying that if you have to go to Jiangdu, the world won't be yours. He killed the writer again, and finally, he came to Jiangdu.

The bonfire of the peasant uprising has intensified. Yang Guang had a premonition that the end was coming, and he was always afraid. He can't sleep at night, and he often screams that there are thieves in his sleep. It takes several ladies-in-waiting to coax and caress like children to fall asleep. One night, Daye Temple caught fire. He thinks the peasant army killed him. He hurried into the west garden and hid in the grass. He didn't dare to come out until the fire was extinguished. After fleeing to Jiangdu, he became more dissolute. He built 100 temples in the palace, and many beautiful women lived in each house. Every day, he takes a room as his master. He took more than 1000 concubines and maids to drink and got drunk all day. He doesn't want to hear bad news, but it still can't get rid of his heart. He often said to Xiao Huanghou, "There are many people out there who want to count me in. Leave him alone and drink happily." Once, he picked up a mirror and looked at it for a long time. He said to Xiao Huanghou, "I don't know who will cut this skull?" Xiao Huanghou asked him in horror why he said so. He forced a smile and said, "There is no fixed number of joys and sorrows, so beheading is nothing." Of course, he doesn't want to do nothing. Seeing that most of the land in the Sui Dynasty had been controlled by rebels, Sui Jun could only be trapped in several isolated cities, such as Luoyang and Jiangdu. Fearing that Jiangdu was unsafe, he planned to move the capital to Danyang in the south of the Yangtze River (now Nanjing, Jiangsu Province) and ordered people to build a palace for him. Yang guang's guards are all from Guanzhong, and they have long resented Yang-ti's long-term residence in Jiangdu. Now that he is moving south, they all miss their relatives in their hometown more and more, and plan to flee back to their hometown one after another. At this time, their morale is floating and they are alienated from each other.

In the 14th year of Daye (AD 6 18), on March 3rd, Yu, a young military supervisor, took the opportunity to push General Right Tunwei to incite the soldiers, changed his clothes and fled to Xige in the evening. Pei Gantong, Ethan, Ma Wenju and other rebels learned from the ladies-in-waiting. The rebel general said: "You are a soldier, you play endlessly, you are extravagant, you are extravagant, you believe in evil, you refuse advice, you make men die on the battlefield, women and children die in the wild, people lose their livelihood, and the world is in chaos. You still say that you are not guilty? " Yang Guang said: "I am really sorry for the people. As for you, you and I enjoyed all the glory together. I'm not sorry for you. Who has the final say in today's affairs? " The rebel general said, "Everyone in the world hates you for being a bad king, and it's not just one person in charge." Say that finish, come forward to pull Yang guang down the cabinet. At this time, the traitor Feng Deyi came to preach Yu Wenhuaji's order and said, "This stupid king doesn't need to be brought to see me, so kill him quickly." Xiao Huanghou pleaded: "The emperor is really not virtuous, but for his past kindness to you, please ask him to step aside, reduce it to three, and let him live." The rebels led by Pei Gantong refused and raised their knives to kill Yang Guang. Yang guang shouted, "Don't start work, let me drink poisoned wine and commit suicide." Pei Gantong is not sure, saying that poisoned wine is not as easy as a blade. Yang guang cried and said, "I am the son of heaven, so let me keep a whole body." After taking off his towel belt, Ma Wenju strangled him in the back room with the towel belt and the soldiers.

Afterwards, Xiao Huanghou told the maid-in-waiting to remove the bed and make a coffin, and temporarily buried Yang Guang's body. Soon, Yu Wenhuaji buried him in the Wu Palace to the west of Jiangdu Palace. After the establishment of the Tang Dynasty, it was moved and buried next to Tang Lei.

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Tang Gaozu (Ethan)

Gaozu, named Li Yuan (AD 566-635), was called Uncle De. Taiyuan stayed behind in the Sui Dynasty and invaded Chang 'an. After Yang Di was killed by Yu Wenhuaji in Yangzhou, he proclaimed himself emperor in Chang 'an. After nine years in office, he was forced to meditate in Li Shimin, Emperor Taizong, and died at the age of 70. He was buried in Xianling (now Tangzhu Village, 43 miles northeast of Sanyuan County, Shaanxi Province).

Tang Gaozu Li Yuan was born in Ji Cheng, Longxi (now northwest of Qin 'an County, Gansu Province). It is said that he is a Taoist priest in Longxi and a native of Julu County. Grandfather Li Hu was an official in the Western Wei Dynasty and was one of the eight pillar countries in the Western Wei Dynasty. His father, Li Bing, was the chief official of Anzhou in the Northern Zhou Dynasty, and was named Tang Guogong. At the age of seven, Li Yuan was named Tang Gong. In 6 17, Li Yuan was appointed by the Sui Dynasty to stay in Taiyuan.

Li Yuanyuan's wife is the daughter of Dou Yi, a noble in Sui Dynasty. Her four sons are Cheng Jian, Shimin, Shuang Yuan and Yuanji. Shuang Yuan died young at the age of 16.

At this time, under the fierce attack of the peasant uprising, the Sui regime had collapsed. In 6 17 AD, encouraged by his second son Li Shimin and his subordinate Liu Wenjing, he sent troops to fight against Sui in Jinyang. In the same year 1 1 captured Chang 'an, made the king emperor, was honored as the emperor's father, and gave orders to the world. In March 6 18, Yang Di was killed by Yu Wenhuaji in Yangzhou. In May of the same year, Li Yuan was abolished, and he became emperor on his own, establishing the capital of Tang Dynasty and Jiande period.

During the ten years from 6 18 to 628, Li Yuan and his son eliminated the separatist forces of various factions and completed the great cause of reunifying the whole country. In June of the first year of Wude (6 18), Li Shimin attacked Xue Ju and Xue Renguo, and the father and son are now in Lanzhou, Gansu. In September, Xue Ju died, and in November, Xue Renguo was captured and killed, thus pacifying the vast northwest region. In the second year of Wude (AD 6 19), the Tang Dynasty adopted intrigue to intensify the internal contradictions of Gui Li Group, thus capturing and killing Gui Li and pacifying the Hexi Corridor. In the same year, Liu Wuzhou and Song Jingang colluded with the Turks and were soon killed by the Turks. At that time, the Yellow River Basin formed the forces of Dou Jiande in Xia Dynasty, Wang in Zheng Dynasty and Tang Dynasty. Paishiming made an expedition to the east and joined forces to deal with him. In the fourth year of Wude, Li Shimin captured and killed Dou Jiande. The king was urged to surrender to the Tang Dynasty. In the sixth year of Wude, Prince Li captured Liu Heida and conquered Hebei. In the seventh year of Wude, Gao Kaidao was killed by his subordinate Zhang Jinshu. Zhang Jinshu is a descendant of the Tang Dynasty.

Li Yuan loves debauchery, is fatuous and incompetent, and has neither entrepreneurial ambition nor entrepreneurial talent. From Taiyuan to the establishment of the Tang Dynasty and the pacification of the world, it mainly relied on the strategy and campaign of the second son Li Shimin. After he proclaimed himself emperor, he attached importance to courtiers and doubted the heroes. Pei Ji, former deputy supervisor of Sui Dynasty, was a fair-weather friend of Li Yuan when he was in Jinyang. He sent maids to Tang Gaozu privately and often gambled and drank with Tang Gaozu day and night. When Jinyang Uprising, Pei Ji sent another 500 maids to March with him in Tang Gaozu. After Li Yuan proclaimed himself emperor, he thought that grief was greater than death in his heart, and made the greatest contribution, making him a high official and a confidant. The original Jinyang made Liu Wenjing, together with Li Shimin, instigate the army to fight north. He was the founding hero of the Tang Dynasty, but he was suspected by Li Yuan and accused of rebellion and wrongful death.

Li, his eldest son, loves wine and sex, and is close to gamblers and bullies, but he was made a prince because he was the eldest son. Qin Ershi and Li Shimin were even more suspicious when they saw the increasing prestige of Tang gaozu. In addition, Prince Li and Li Yuanji, the king of Qi, are both courtiers, so the concubines admire Yuanji in front of them, but belittle them. Tang gaozu gradually alienated the people and became close to Yuanji. And acquiesced in Li and others to attack and murder him. It was only because of the war that Li Shimin had to rely on it and finally made up his mind to get rid of him. Once, Li Yuan believed Li Yuan's favorite concubine and Yin Defa falsely accused him of usurping the throne, and immediately called him in to reprimand him, saying, "The son of heaven was made in heaven, and it can't be done by tricks. I'm not dead. Why are you so impatient! " Li Shimin defended himself again and again, but Tang Gaozu just didn't believe him. He also slapped the table and cursed. At this time, the messenger came to report the Turkish invasion. Li Yuan immediately turned his anger into a smile and said, "Forget it, let's discuss how to deal with the Turks."

On one occasion, Prince Li invited him to a dinner party and fell to the ground after drinking too much. Li Shentong, the king of Huai 'an, was there to help Li Shimin return to the palace of the Qin Dynasty. Li Shimin coughed up several liters of blood, and he quickly sought medical advice before slowly recovering. When Tang Gaozu heard about it, he went to visit Li Shimin. Tang gaozu said, "Your brothers are at odds. They are all in the capital. You still hold a grudge. You should go to Luoyang and mark the east of Shaanxi for your father. You can build a flag for the son of heaven. " When Li and Li Yuanji learned this, they conspired to say, "If the King of Qin goes to Luoyang, he will lose control. Might as well leave him in Chang 'an. He is just an ordinary man. Easy to get! "Therefore, people who have heard of Gaozu and said that they are from Qin king Palace jumped for joy when they heard that they were going to Luoyang. I'm afraid I can't go back to Chang 'an in the future. Tang Gaozu stopped the matter after hearing this.

In June of the ninth year of Wude (AD 625), he took the initiative to launch the change of Xuanwu Gate, killed Li and his fourth brother Li Yuanji, and sent troops into the palace. At this moment, Tang gaozu and his concubines and ministers are boating in Gong Yuan Lake. Wei Chijingde said to him, "The prince and the king of Qi rebelled, and the king of Qin was afraid to disturb your majesty, so he sent someone to escort you." Li Yuan was surprised and asked, "Where are the Prince and the King of Qi now?" . Wei Chijingde replied, "He has been executed by the King of Qin." . Tang Gaozu was very uncomfortable and was ordered to land, asking what to do. Xiao Yu, a recent minister, said, "The merits of the King of Qin are unparalleled and won the hearts of the people. Since it has not been completed, Yuanji should make King A Qin a prince. " Wei Chijingde went on to say, "it's not completely calm outside. Please send a message that all armies should be bound by the king of Qin. " Tang Gaozu had to make a law according to his words. Three days later, Tang Gaozu officially established Li Shimin as the Prince, in charge of national politics.

Some scholars hold different views on the change of Xuanwu Gate, and think that Li Yuan is not a fatuous generation, and Li is not a stubborn generation. The dispute with Li belongs to the feudalistic princes killing each other in order to seize the throne.

On Jiazi Day in August of the same year, Li Shimin forced Li Yuan to meditate, and Li Yuan acceded to the throne and proclaimed himself emperor. In the second year, the title was changed to "Zhenguan". In 635 AD, 10, Li Yuan died of illness. The temple name after death is Gaozu.

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Emperor Taizong (Li Shimin)

Emperor Taizong's name was Li Shimin (599-649 AD), the second son of Tang Gaozu Li Yuan. After killing Prince Li, he forced Gaozu to give him the throne. After 23 years in office, he died of dysentery at the age of 5 1 and was buried in Zhaoling (now Jiuzong Mountain, 50 miles northeast of Liquan County, Shaanxi Province).

Li Shimin, born in the 18th year of Emperor Wen of Han Dynasty (599), is the second son of Tang Gaozu Li Yuan. Li Yuan hoped that he would be a person who would help the world and people in the future, so he was named Shimin. During the reign of Yang Di in the Sui Dynasty, the anti-Sui struggle broke out one after another. In 6 17 years, when the time was ripe, Liu Wenjing and others instigated the fight against Sui and attacked Chang 'an. After the establishment of the Tang Dynasty, Li Shimin was made King of Qin and served as Minister of Books. Facing the separatist situation, he led the troops to fight in the North, and successively eliminated the separatist forces such as Xue Renguo, Liu Wuzhou, Wang and Dou Jiande, and gradually unified the whole country. He was a true pioneer of the Tang Dynasty.

Not only won the world, but also recruited a large number of talents, including Qin, Xu Shiqi and Li Jing.

Famous scholars, such as Fang, Du Ruhui, etc. 18 bachelors. This enabled him to launch a fierce battle for the throne with Prince Li. Li has the legal status of a prince and is supported by a large number of royal families. He looked forward to being in Guanzhong, with a solid foundation in the capital Chang 'an, and even the palace guards were under his control. Gaozu likes him very much, and his favorite concubines, Zhang Jieyu and Yin Defai, are also closely related to him. Taking advantage of these advantages, he tried many times to get rid of Li Shimin in order to succeed to the throne. One night, he invited Li Shimin to drink at home and poisoned the wine. Li Shimin caught off guard, picked up the cup and drank it. Suddenly, he felt abdominal cramps. His uncle Li Shentong, the king of Huai 'an, was there and took him back to the West Palace. He vomited and vomited a lot of blood before he knew that Li had poisoned him. He quickly let the doctor take medicine and finally recovered slowly.

Since then, Li joined forces with his four brothers, Li Yuanji, King of Qi, and stepped up the cleanup activities. He secretly bought off Wei Chijingde and other generals of King Mi of Qin with a large sum of money, but was rejected. He was also afraid of courage, and gradually transferred his confidant from Qin to. In May of the ninth year of Wude (AD 626), when the Turks invaded the Central Plains, Li took the opportunity to play Gaozu, and asked Li Yuanji to be the coach to fight against the enemy. Gaozu agreed. Li Yuanji proposed that Qin and Cheng should be under his command, and the elite soldiers of Qin should be transferred to enrich their troops in an attempt to seize military power and then kill them. Facing the crisis, Li Shimin discussed the countermeasures with his brother-in-law Sun Chang Wuji and Wei Chijingde. The two men advised Li Shimin to strike first. Li Shimin hesitated and said, "It's always bad for brothers to kill each other. It is better to wait for them to start first, and then we will fight back. " The two men were in a hurry, saying they wouldn't do it, and they didn't want to die in vain. Li Shimin is determined to strike first.

On June 3, 626, he went to Gaozu to expose the crimes of Li and Li Yuanji, saying that they had run amok in the harem and had an affair with Yin Defai. This touched a sore spot for Gaozu. He was frightened and said, "How dare they do such a thing?" Li Shimin went on to say, "They tried to hurt me several times. If it weren't for the children, they would never see my father! " Talking and crying. Gaozu thought it was of great importance and asked the three brothers to go to court early tomorrow morning and confront each other face to face in order to find out the facts and deal with them in the future.

Early the next morning, Li Shimin personally led Sun Chang Wuji and others to ambush around Xuanwu Gate. Zhang He, the satrap of Xuanwu Gate, is Li's confidant. At this time, Li Shimin sent someone to buy it with a large sum of money. When you hear the wind, send someone to tell Li at once. Li and Li Yuanji discussed, and Li Yuanji said, "Let's hurry up and arrange the soldiers and horses, saying that if we are sick, we will not go to court and wait and see." Li said, "I'm not afraid. There is a Zhang in the palace, and Yin Fei is the inside man. My army is guarding the Xuanwu Gate outside the palace. What can he and Li Shimin do to me? " Ask Li Yuanji to go to court with him. The men also advised Li to take it to the court to guard it, just in case anything happens. He refused and rode into Xuanwu Gate with Li Yuanji.

When they rode to He Lin Temple, they suddenly felt the atmosphere was abnormal, so they quickly turned their heads and ran back. Suddenly someone shouted, "Your Highness, why didn't the King of Qi go to court?" Li Yuanji looking back, it was Li Shimin. He quickly picked up the bow and shot three arrows, but one arrow shot Li off the horse and died immediately. Li Yuanji fled in panic, ran into Wei Chijingde and led more than 70 cavalry to kill him. Then he turned his horse and ran back. A burst of disorderly arrows came, and he rolled off the saddle and got into the Woods, but he happened to meet Li Shimin. In the fierce fighting between the two men, Li Yuanji rode on Li Shimin, grabbed the bow and grabbed Li Shimin's throat. At this critical juncture, Li Yuanji suddenly saw Wei Chijingde running and fled, but was shot dead by an arrow.

The soldiers of the East Palace and Qi learned that Xuanwu Gate had an accident and immediately dispatched more than 20,000 people to storm Qin. Li Shimin commanded his men to resist, while sending Wei Chijingde to lead the troops into the palace. At this time, Gaozu was boating on Lake Gong Yuan with his concubines and ministers. I was surprised to see Wei Chijingde's troops. Wei Chijingde told him: "Prince, the king of Qi rebelled, and the king of Qin was afraid of disturbing your majesty, so he sent a special envoy to escort him." Gaozu quickly asked, "Where are the Prince and the King of Qi now?" Wei Chijingde replied: "It has been executed by the king of Qin." Gaozu was very uncomfortable and ordered to land, asking what to do. Xiao Yu, a nearby prime minister, pushed the boat with the current and said, "The king of Qin has unparalleled merits and won the hearts of the people. Now that Yuanji has not been built, it is time to make King A Qin a prince. " Wei Chijingde went on to say, "it's not completely calm outside. Please send a message that all armies should be bound by the king of Qin. " Gaozu had to make an imperial edict according to his words. Three days later, Emperor Gaozu officially made Li Shimin the Prince, in charge of state affairs. This event is called "the change of Xuanwu Gate".

Some scholars hold different views on the changes of Xuanwu Gate. They think that Li Yuan is not a fatuous and incompetent person, and Li is not a stubborn person. The dispute with Li belongs to the feudalistic princes killing each other in order to seize the throne. I don't agree with the tendency of some literary works to belittle Li Yuan and Li and elevate Li Shimin in the Xuanwu Gate Revolution.

This series of measures taken by Li Shimin turned China, a poor and troubled city, into a country with prosperous economy, strong national strength, clear politics and stable society, and made China the most prosperous feudal country in the world at that time, which was called "the rule of chastity" in history.

However, in his later years, Li Shimin's life tends to be luxurious again. He built many buildings, increased taxes and used the army abroad for many years. His three expeditions to Korea failed, and his desire to develop his power eastward failed to come true.

In March 649, Li Shimin suffered from dysentery, and the treatment was ineffective. He ordered the prince to represent state affairs in Jinyemen. In May, critically ill, he called the prince and concubines into the bedroom, called Sun Chang Wuji and Chu Suiliang into the bedroom to accept his life, and ordered Chu Suiliang to draft a testament. Soon, the British monarch Li Shimin died in the Dafeng Hall of Chang 'an Palace.