According to the Records of the Three Kingdoms, Zhou Yu and Sun Ce are close friends. They used to take care of their old mother, and later they became brothers-in-law. Naturally, their relationship is serious. The old lady, Sun Ce's ex-mother, once ordered Sun Quan to take her younger brother to cure Zhou Yu.

But there are no eternal friends, only eternal interests. Zhou Yu and Sun Ce started a business together, and as the company's veteran, Sun Quan's rule will naturally be threatened. Therefore, Sun Quan's consideration is also reasonable. However, there is no record that Zhou Yu proposed 50,000, only 30,000, but Zhou Yu originally only proposed 30,000. But in the face of foreign aggression, Sun remained United, not to mention Sun Quan and Zhou Yu.