I guess what you mean is the proverb "the essence has been exhausted and all can be discarded".

Not saving a chess piece that is already dead is just an introductory level. In fact, if the goal is to win chess pieces, everything will lose its use value or interfere with the overall situation. The chess pieces with the overall concept should be discarded without hesitation

. Even a big dragon that can work can be decisively discarded. In many cases, reasonable

feeding and Abandoning a child will put a heavy burden on the other party.

Understanding this, your level and realm will improve.