Tell me, what is the most powerful place in Li Shimin?

Shortly after Li Shimin ascended the throne, a new library was built according to the model of Qin Literature Museum, which further reserved world literary talents. Li Shimin knows how to perform people's duties well and employs people according to their abilities, regardless of their origins. Fang Lingxuan and Du Ruhui were used in the early stage, and Sun Chang Wuji, Yang Shidao and Chu Suiliang were used in the later stage. They were all honest people. Others, such as Li Ji and Jing Li, are also famous for their generation. In addition, Li Shimin also let bygones be bygones, re-used the old headquarters of Wei Zhi and Wang Gui, and handed over Weichi Gong and took away a large number of talents. He also ordered Gao Shilian, Ling Hudefen and others to rebuild the Genealogy, emphasizing virtue, speech and standing, and replacing the world with heroes; And through the imperial examination, attract talented literati in cloth and replace their family background with the imperial examination. As a result, the opportunities for children from poor families to become officials have greatly increased, bringing a new atmosphere to politics. In addition, he accepted Feng Deyi's suggestion, appointed the imperial clan as an official, and got rid of the bad habit of enjoying the success.