Xue immigrated back to China.

During the reign of Li Zhi, the social economy continued to develop, and the national population increased from 3.6 million in the 22nd year of Zhenguan to 3.8 million in the 3rd year of Yonghui.

Both the monarch and the minister remember Taizong's wishes and remain faithful. Emperor Taizong instructed coachable people to love their people. When Gao Zong ascended the throne, he announced to his ministers: "If something is inconvenient for the people, follow it, and if it is insufficient, seal it." On that day, the secretariat entered the cabinet and asked the people about their sufferings; Emperor Taizong instructed him to respect frugality, and Emperor Gaozong immediately issued a letter: "Beijing officials and other state criminals offer eagles, dogs and horses." At the beginning of Li Zhi's accession to the throne, he changed the three-day visit of Emperor Taizong's reign into a one-day visit to be diligent and love the people. After he acceded to the throne, he reused Li Ji, Sun Chang Wuji and Chu Suiliang, the old ministers of Taizong. The monarch and his subjects obeyed Cao Cao's instructions and carried out according to the laws of Emperor Taizong, which was quite a legacy of the rule of chastity.

In the later years of Emperor Taizong, there was an infighting between Prince Li Chenggan and Wang Liwei. Therefore, Emperor Taizong abolished Li Chenggan, expelled Lee Tae, and made Li Zhi, king of Jin, a prince. After the death of Emperor Taizong, Li Zhi acceded to the throne, namely Tang Gaozong. At this time, the Tang dynasty inherited the rule of Zhenguan, and its national strength was at its peak, which was called the rule of Yonghui in history. There are famous artists such as Su Shi and Xue Shi, and famous ministers such as Wuji and Chu Suiliang. Internally, we will continue to implement the system of equal land, and select low-level but talented officials and officials. Externally, in 659, the West, Tu and Jue were destroyed, and the territory expanded westward to salty, sea, Arab, wooden and river areas, with Anxi as the capital of Yecheng. Sixteen viceroy offices have been set up in the west of Qingling, so that Tuhuoluo, Hu, Maha, Da, Luo, Zhi, Guo and Wang, and other Central Asian monarchs can also serve as viceroy. In the East, together with Singapore and Romania, we wiped out the wars, strikes, defeats, Japan, Japan, aid and soldiers of the northeast powers Gao, Li, Bai, Ji and Bai Jiangkou. In the Tang Dynasty, the establishment of Anton's residence in Korea, Xi 'an and Peninsula indirectly promoted the unification of Korea, Xi 'an, Peninsula and Romania.

Yonghui reign was a prosperous period in the early days of Li Zhitong's rule in Tang Gaozong. In the early days of Tang Gaozong's rule, Yonghui was the national title. Li Zhi inherited all the policies, measures, methods and practices of his father Li Shimin Taizong, developed the economy, advocated culture and education, and ruled the world.

According to the records in Old Books of Tang Dynasty, there were1800,000 households in the first year of Tang Wude. There were 2190,000 households in the seventh year of Tang Wude, 3.04 million households in the thirteenth year of Tang Zhenguan, 3.6 million households in the twenty-second year of Tang Taizong Zhenguan and 3.8 million households in Tang Gaozong Yonghui. According to Volume 7 of Food, in the 13th year of Tianbao of Xuanzong of Tang Dynasty, there were 9069 154 households and 52,880,488 people in China. According to historical records, it took 100 years for the Tang Dynasty to recover and surpass the level of the heyday of the Sui Dynasty.

At that time, there were 15 roads in China, and there were 30 million people north of Huaihe River in Qinling Mountains. The most populous areas are Henan, Hebei and Huaibei, with a total population of nearly 20 million. The population of Chang 'an, the capital of Jingzhao Prefecture, reached 6.5438+0.96 million, and that of Luoyang, the capital of Henan Province, was 654.38+0.10.8 million. Weizhou, a transportation hub city along the Grand Canal in Sui and Tang Dynasties, also has a population of 165438+ 10,000. Hedong Road has a population of 3.72 million; There are 6.5438+0.5 million in the pass; Longyou Road has the least population, only 530,000. Among the southern roads, Jiangnan East Road has the largest population, 66 1 10,000. Next is Jiannan Road, with a population of 4.09 million, including 920,000 in Chengdu. The population of Jiangnan West Road is also 3.72 million, Huainan Road is 2.27 million, and Lingnan Road1160,000. Guizhou Zhonglu has the lowest population in China, only 1.6 million.

During the An Shi Rebellion, the social production in the north was destroyed, and the population in the north either moved south or died. After the Anshi Rebellion, the number of registered households recorded in history was only one-third of that before the Anshi Rebellion, and the number of registered households in the Tang Dynasty was restored. It is estimated that the registered population in the mid-Tang Dynasty was between 4 million and 5 million. Therefore, the national population distribution pattern has undergone major changes. At the beginning of the Tang Dynasty, North China accounted for 75% of the national population and South China accounted for 25%. By the end of the Tang Dynasty, the national population distribution pattern was 50% in the north and 50% in the south. The southern region attracts immigrants from all over the country, but the population of Qinghe County in Hebei Province has dropped sharply from 800,000 before the Anshi Rebellion to 654.38+10,000. In the late Tang Dynasty, the separatist regime of the buffer region and the rebellion in Huang Chao made the population move southward to seek refuge more serious. The Anshi Rebellion until the end of the Tang Dynasty was the second large-scale southward migration wave in China's population history. Since then, the South has surpassed the North in all aspects of economy and culture. During the Five Dynasties and Ten Kingdoms period, the rulers of the nine southern countries were all northern immigrants in the late Tang Dynasty, except Wu and wuyue who were natives of the south and Nanhan who were descendants of early immigrants.

In its heyday, the Tang Dynasty made great achievements in culture, politics, economy and diplomacy. Its politics is three provinces and six departments. In the early stage, the central power was in the emperor and prime minister, and later it became the emperor and eunuch. With the implementation of the imperial examination system in Sui Dynasty, the imperial clan system in Jin Dynasty and Southern Dynasties no longer rose. At the beginning of the military system, the official system was adopted. The military system was strong and prosperous, and it defeated foreigners many times. Special units such as our army (buffer region) appeared in the later period, and 48 buffer regions appeared in the later period of the Tang Dynasty. The Tang Dynasty was the first powerful country in the world at that time, competing with Turks, Gao, Zhu, Li, Tu, Fan, Da and Shi for the hegemony of the Quartet. By means of restraint, restraint and re-restraint, the relationship between northern nationalities, such as Yi, Qi and Dan, is maintained. And let New Zealand, Romania, Bohai, Shanghai, China and Japan absorb the culture and political system of the Tang Dynasty. The Tang Dynasty was rich in economy, combining the economies of North China, Guanzhong and Jiangnan, and paid more attention to Jiangnan taxation in the later period. The system of land, salt, iron and tax has changed with the social changes, from the system of equal land and tenancy adjustment to the two tax systems, and many miscellaneous taxes have been added. Among them, the two tax systems affected the taxation, taxation, system and degree of China in the second half of the year. The culture of the Tang Dynasty is eclectic, accepting all ethnic groups and religions, exchanging and integrating, and becoming an open international culture. Its literary development reached its peak and its poetry was the most prosperous. At that time, there were poets Li Bai and Du Fu. And Han Yu, who promoted the ancient prose movement. Its history books and legends are also very developed. Due to the absorption of western and regional characteristics and religious colors, the art of the Tang Dynasty is very different from that of the previous dynasty, with murals, sculptures, calligraphy and music all very developed. The reputation of the Tang Dynasty is far overseas and its historical position is profound. In the Ming and Qing Dynasties, China was called "the Tang people" overseas.

Emperor Taizong was a master of English in the history of China, and his achievements were praised by later generations.

During the Zhenguan period, Emperor Taizong's various good policies made the officials clean, the society stable, the people well fed and the economy developed rapidly, and the country was revived, which laid the foundation of the Tang Dynasty for 274 years.

Emperor Taizong paid special attention to agricultural production economically, and implemented the system of equal land and rent adjustment, "eliminating extravagance and frugality and neglecting thin taxes", so that the people could live and work in peace and contentment. Pay attention to frivolous and thin taxes, and the collection of corvee will not seize the farming season; At the same time, Emperor Taizong advocated frugality, dismissed more than 3,000 ladies-in-waiting, and ordered the removal of treasures from all directions, which enabled agriculture and people's livelihood to develop continuously.

At the end of Sui Dynasty and the beginning of Tang Dynasty, the world was in chaos, the countryside was deserted and the people were displaced. Emperor Taizong appealed to exile, returned to his hometown, granted land for farming and stabilized people's livelihood. At the beginning of the Tang Dynasty, Guanzhong suffered from famine for years. Emperor Taizong immediately opened a warehouse to relieve the victims and allowed the people to eat in other States. And took out the imperial palace gold silk, for the disaster, the people redeemed their children and let the victims spend the famine year.

Emperor Taizong attached great importance to the cleanliness of official administration, ordered the party to save redundancy, and sent thirteen ambassadors, including Li Jing, to inspect the whole country, take exams and observe the wind. He also personally selected local officials such as the governor and the secretariat, and wrote their merits and demerits on the palace screen as the basis for rewards and punishments. In addition, it is also stipulated that Beijing officials with more than five grades should take turns to stay in Zhongshu Province, so as to postpone their visit at any time, inquire about people's feelings, time, illness, sufferings and charity, political gains and losses, and hundreds of officials encourage themselves to be clean and honest, thus directly improving politics, government affairs, efficiency and effectiveness.

Emperor Taizong made outstanding achievements in martial arts for foreigners. He has fought against foreign countries many times, using foreign troops and soldiers, and has successively put down the sudden, faint, savage, open, tuo, hui, ge, Gao, Chang, Yan, Jian, GUI, Zi, Tu, Gu and Hun. Because the voice of the Tang Dynasty spread far and wide, all directions served him. Therefore, the country can enter a happy world.

Emperor Taizong was only 27 years old when he ascended the throne. Tang Dynasty developed martial arts in the unification, governance, demotion and literation of Emperor Taizong of Tang Dynasty, and created the famous governance in the history of China.

During the Zhenguan period, under the painstaking efforts of Emperor Taizong, various political systems of the Sui Dynasty were continued, such as the system of three provinces and six departments, the system of officers and men, the system of land equalization, the system of tenancy adjustment, the system of imperial examination, and the system of perpetual reckoning, which were complete and had a far-reaching impact on later generations.