The Xuanwu Gate Incident was a palace coup for the throne of the Tang dynasty on 2 July 626, [a] when Prince Li Shimin (Prince of Qin) and his followers assassinated his brothers Crown Prince Li Jiancheng and Prince Li Yuanji (Prince of Qi). Li Shimin, the second son of Emperor Gaozu, was in an intense rivalry with his brothers.
The Xuanwu Gate Incident (玄武門之變) refers to a palace coup on 2 July 626, [lower-alpha 1] when the Chinese dynasty Tang Dynasty's Prince Li Shimin (Prince of Qin) and his followers assassinated Crown Prince Li Jiancheng and Prince Li Yuanji (Prince of Qi). [1] .