In May of the first year of Yongjia (307), Sanji and Zhang Hong decided that Li Feng and others would take Schleswig as the pioneer and attack Yecheng. Sima Teng, the commander of Ye Zhen and the new king of Cai, said dismissively, "Hu Weicheng has been in Bing for seven years alone, and he can't defeat him. There is nothing to worry about, you little thief. " When our army approached, Song Feng, the satrap of Wei County, confronted our army and was defeated. Earlier, Nakano's treasury dried up, but Sima Teng rarely used it. Sima Teng is stingy, and he doesn't get any benefit from it. When the crisis approached, he gave soldiers several liters of rice and ten feet of silk, so people didn't use it. When Sima Teng saw this scene, he thought that he couldn't keep it, so he took his family and staff out of the city. Feng Li chased him and killed the coach Sima Teng. Sima Tengsheng has four sons, namely, Sima Yu, Sima Jiao, Si Mashao and Sima Que, and is accompanied by Sima Yu, Sima Jiao and Si Mashao. Sima Yu, the eldest son, was very brave when he saw that his father was killed by Li Feng. Sima Yu was determined to avenge his father to death, so he tried to kill Li Feng, and Li Feng drowned. On the same day, Li Feng figurehead killed Sima Yu and his two younger brothers, Sima Jiao and Si Mashao, as well as the stag satrap Cui Man, the cyclist Shi Yangheng and Cai Ke, who was engaged in the corps commander. At that time, many famous soldiers who were exiled in Ye and attached to Sima Teng were also killed in the war, killing more than 10,000 people. So he and Schleswig occupied Ye, burned palaces since Cao Wei, and plundered women and treasures.
Later, Gou saved Ye, defeated his army in succession and returned to Pingyang. It was midsummer and the body had rotted beyond recognition. The bones of Sima Teng and his three sons, Sima Yu, Sima Jiao and Si Mashao, have not been found. The court appointed Sima Tengshu's son Sima as the new Cai Wang.