Just like there are a thousand Hamlets in a thousand people's minds, everyone has different ideas on this issue. And my answer is: Shan Xiongxin only drank Cheng Yaojin’s wine before he died, which truly revealed the ugly side of human nature. Why do I say this? Please look down.

First of all, let’s take a look at Shan Xiongxin’s ending, which confirms a sentence: It’s better to learn from Taoyuan to make three brothers, than to learn from Wagang to make incense. What does this indicate? I think it shows Shan Xiongxin's disappointment and his disappointment in the three sworn brothers except Cheng Yaojin. Otherwise, such an eternal saying would not have been left to warn future generations.

In fact, according to historical records, Shan Xiongxin not only drank Cheng Yaojin’s wine, but also did another thing, which was to eat the meat of another brother, Xu Maogong. Everyone read it correctly. It was a piece of meat cut off by Xu Maogong from his body, because Xu Maogong felt that he was sorry for Shan Xiongxin. He said: "You and I were brothers originally. You died and I lived alone, but I have vowed to fulfill it." You can only die by your own career, so you take the first step and I will definitely help you take care of your family."

In fact, Xu Maogong did this. He treated Shan Xiongxin's son Shan Daozhen. He took great care of his son and helped his son to become the Sima of Liangzhou. He fulfilled his promise to Shan Xiongxin and lived up to Shan Xiongxin.

Actually, I think everyone’s position is different, even though the five Wagang brothers are sworn brothers and can live and die together. But Shan Xiongxin turned to Wang Shichong, and the others turned to Li Shimin. From that moment on, they were not just brothers, because their brotherhood was mixed with some other factors. In the whole thing, Cheng Yaojin was indeed the one who did the best, but it cannot be said that the other three brothers were wrong. It's just that sometimes human nature is really unpredictable.