When did Qin Shihuang reuse Lisi, after or before national reunification? Please have a basis. Thank you.

Reese (? -208 years ago), Shangcai (now southwest of Shangcai County, Henan Province) was a famous politician, writer and calligrapher in the Qin Dynasty. In the contention of a hundred schools of thought, Li Si and Han Fei learned from Xunzi the art of emperors, and later both became representatives of Legalists. In his early years, when he was young, he worked as a small official in the township, mainly responsible for the documents and materials in the township. He saw that the mice in the bedroom toilet were hungry and the mice in the granary were full and worried, and sighed, "People's virtue is like rats, where do they live!" " "So I learn from Xunzi. After learning that, he inspected the current situation, thought that the king of Chu was incompetent and the six countries were weak, and decided to explore the state of Qin in the west. At that time, he bid farewell to Xunzi and said, "Criticism is greater than meanness, and sorrow is greater than poverty. Being in a humble position for a long time, in the land of suffering, is not the evil interests of the world, nor the feelings of a scholar who relies on inaction. Therefore, Si must talk about the king of Qin. "When the Qin Dynasty was put into the state of Qin, it happened that the king of Qin Zhuang died soon. At that time, I was promoted to, so I took refuge in the door as a diners, and at the same time I was appreciated, so I got the opportunity to analyze the situation and provide plans to Qin. Sure enough, the King of Qin was moved by his Lian Heng strategy and was appointed as a long history. Then use strategy, buy off world celebrities with heavy money, and murder people who don't want to make friends with assassins. Later, he was officially promoted to Guest Secretary. In the fourth year of Qin Dynasty (the first 237 years), the case of a South Korean water conservancy engineer's mole broke out. Encouraged by the imperial clan minister, the king of Qin ordered the expulsion of all Hakka officials, so Reese wrote a letter of admonition to the king of Qin, which showed the importance of tolerance. He believes that "Taishan does not let the soil, so it can become big; "Rivers and seas do not choose trickle, so they can be deep; Wang feigong, so he can understand his virtue; There is no good place in the old land, no foreign country for the people, beautiful seasons and blessings for ghosts and gods. The reason why these five emperors and three kings are invincible is also. Today, abandoning the leader of Guizhou to the enemy, while the guest is a vassal, makes the world retreat and dare not go west, and is bound to stay in Qin. This is also the so-called thief beating soldiers and stealing food. So the king of Qin decided to cancel the marching orders, formally reuse Reese, and strengthen the blow to other countries. South Korea was very afraid of Qin, so it sent Han Fei to Qin for peace. At this time, the king of Qin detained Han Fei in Qin. In the 14th year of Qin Dynasty (233 BC), Li Si killed Han Fei privately. In addition, it helped the king of Qin unify the world, abolished the enfeoffment system, implemented the county system, and unified the national monetary system. Soon promoted to prime minister. In the thirty-fourth year of the first emperor (2 13 BC), some people proposed to destroy hundreds of scholars such as poems and books collected by the people and kill Confucian scholars, which was called "burning books to bury Confucianism" in history. In July of the thirty-seventh year of conspiracy to kill (2 10 BC), Qin Shihuang handed over the imperial edict of Fu Suli to Zhao Gao at Sandduntai (now Guangzong, Hebei Province) and died soon. But he wanted Hu Hai to be emperor, so he found Hu Hai and Reese to plot. Originally, they didn't accept it, but because of Zhao Gao's retort, they changed their mind. Subsequently, Reese kept the death of Qin Shihuang a secret, conspired with Zhao Gao to help Hu Hai become a prince, and sent messengers to his son Fu to die. After the success, it was not until Xianyang that the death of Qin Shihuang was made public and Hu Hai was made emperor. In July of the first year of framing Qin Ershi (209 BC), an uprising broke out in Chen Sheng and Guangwu. Soon, Zhao Gao framed Reese for trying to cede territory to be king, and also framed Li You, the son of Reese, for having an affair with the rebels. Reese, who knew the truth, wrote a letter to Qin Ershi, but was detained by Zhao Gao and sent to prison. Later, he couldn't stand the punishment and was forced to confess. In July of the second year (208 BC), Qin Ershi was beheaded in Xianyang. Before he died, he said to his son, "I want to go out to the East Gate of Shangcai and take the yellow dog to chase a sly rabbit. How can I get it? " "The father and son cried to each other and wiped out three families. Li Si advocated that Xiao Zhuan was the standard character, which played a great role in the standardization of Chinese characters. It is said that the stone carvings written by Li Si include Taishan stone carving, Langya stone carving, Yishan stone carving and Huiji stone carving. The main work "Persuade to Expulsion": protesting the decree of the Qin State on expelling immigrants. year