In fact, Xiang Yu made the decision to kill these two hundred thousand soldiers instead of integrating them for a certain reason. As we all know, when we send troops to fight, the soldiers can't come out, and the food and grass come first. If we keep these 200 thousand soldiers, the food and grass will be consumed badly that day. Originally, our own soldiers were starving, and we had to leave rations for these enemy soldiers. If you don't stop, kill them all. Zhang Han's army was left alone, and he was not afraid of what big waves he would set off. He may also be a pawn that restricts Liu Bang.
Unfortunately, Zhang Han, a talented person, ended up stuck in one place and became a pawn to restrict others.
This is why Zhang Han didn't really want to be loyal to Xiang Yu. He was only threatened by his own life. But for Xiang Yu, this is obviously a very good move. Not only won the victory, but also solved the worries, and also gained a good general talent.
Later generations also said that Xiang Yu was a faint move. However, later generations still learned this trick. The only bad thing is that they have not lost their good reputation, but I think as long as we master the people's speech, this problem will not be a big problem.