Sima Yue
Early in 307, Emperor Hui was poisoned. (Most historians believe that Sima Yue ordered the murder, but there is no conclusive evidence.) Emperor Hui's wife, Yang Xianrong, believing that she would not be honored as empress dowager if her brother-in-law inherited the throne, tried to have Sima Qin declared emperor; she was rebuffed by Sima Yue, however, and Crown Prince Chi succeeded to the throne as Emperor Huai. Emperor Huai honored her with the title "Empress Hui," but not empress dowager. He created his wife Crown Princess Liang Lanbi empress.