sentences:  In the eighth month of 1213, when the Mongols attacked Zhongdu again, the general Heshilie Zhizhong (紇石烈執中; also known as Hushahu 胡沙虎) rebelled against Wanyan Yongji and assassinated him.In the following month, Hushahu installed Wanyan Xun (Emperor Xuanzong) on the throne to replace Wanyan Yongji.He also gathered about 300 officials to support him and openly urged Emperor Xuanzong to posthumously demote Wanyan Yongji to the status of a commoner.