In the ninth year of Wude's reign, during a night meeting at the Prince of Qin's Mansion, Li Chengqian woke up from his sleep and pushed open the door. Changsun Wuji and Yuchi Jingde were urging Li Shimin to take action. I put on my Chinese clothes and knelt in the light: Dad, do you think the emperor asked you to go to Luoyang to build the banner really to protect you? Donggong and King Qi both had their swords on their necks. Li Shimin stared at me for a long time - after this night, no one can stop Xuanwu Gate.