According to China's legal method, can it really be said that you can't kill people in self-defense?

Yes, for example, when the police judge that the other party may endanger others, they ask the other party to raise their hands, and when the other party raises their hands, they laugh, and the police kill the other party. The possibility of self-defense is 99.999%

If people are forced to kill the murderer by mistake when facing the murderer who has raised the butcher's knife to him, the possibility of self-defense is close to zero.