Datang, It Will Change When It Comes

Li Jian, a pharmaceutical graduate student who has worked in the district hospital for 16 years, is an old man. In June 2025, he traveled back to Li Kuan who was in the third year of Wude in the Tang Dynasty. He was not very familiar with history. He only knew about the Xuanwumen changes in Wude 9th year. Empress Sun was angry, Li Chengqian's rebellion failed, Li Tai did not come to power, Li Zhi came to power, Wu Zetian, Sun Simiao, the 24 heroes of Lingyan Pavilion don't remember a few others that are not clear, but fortunately there is a system, and now that they are here, they have to change.