Sima Daozi
In 398, the provincial official Yu Kai (), unhappy that part of his domain was given to Wang Yu (), an official trusted by Sima Daozi, managed to persuade Wang Gong and Yin that the move was actually against them, and so Wang Gong and Yin started another rebellion. Sima Daozi, in fear, panicked and spent his days drinking, entrusting all important matters to Sima Yuanxian, who at the time appeared intelligent and resolute, reminding his followers of Emperor Ming. Soon, Sima Daozi persuaded Wang Gong's general Liu Laozhi () to betray him, and Wang Gong was captured and killed. Sima Daozi, under the suggestion of Huan Xiu (), then managed to cause dissension between Yin and his generals Huan Xuan and Yang Quanqi () by offering Huan and Yang key posts; although Huan and Yang nominally remained Yin's allies, Yin was forced to withdraw his troops, and from that point on no longer posed a major threat, as his domain had now been divided into three, with Huan and Yang each given a third. Sima Daozi, believing that his son had made the right predictions, trusted him even greater after this point. In late 398, the magician Sun Tai (), a friend of Sima Yuanxian's, who had gathered great following due to his magic, was exposed as planning a plot to take over the central government, and Sima Daozi ordered Sima Yuanxian to trap Sun Tai and execute him. Sun Tai's nephew Sun En fled to Zhoushan Island and planned revenge.