Cao Cao and Ma Chao fought in Tongguan. As a result, Cao Cao was defeated so badly that he had to cut his beard and abandon his robe. Cao Cao ran away desperately, and the horse ran after him, shouting while chasing: It's Cao Cao in red robe, kill him, reward him with 1000 yuan, and he will be promoted to the third level! So Cao Cao threw away his robe and continued to escape. Ma Chao shouted again: Cao Cao bearded, chase! Cao Cao was so scared that he took out a knife and cut off his beard. Anyway, it's miserable and embarrassing. But it is worth mentioning that Cao Cao was only partially defeated, and the final result of the whole campaign was actually that Cao Cao won. Although there was a process of running away in a mess, the final outcome was victory. So the real meaning should be to be weak first, then strong, then miserable, and finally have a good result, but the process is a bit difficult.