Sun and Liu joined forces to resist Cao, in order to succeed, Huang Gai accepted Zhou Yu's bitter plan, deliberately said in front of Zhou Yu to surrender Cao, Zhou Yu then beat Huang Gai a hundred big boards, did not expect to beat 50 boards, Huang Gai because of his old age, immediately fainted, at that time and some people such as Lu Su pleaded for mercy, so they helped him down.