How to manage the relationship between sister-in-law and sister-in-law? urgent

No way, any man has no principles. I'll just listen to trivial and useless things, but when it comes to serious matters, principles must be adhered to. If a person loses his own principles, then he is finished. All you can do is try to avoid unpleasant things happening, but you will be very tired. There is nothing you can do about it. China is like this. The problems left over from its five thousand years of long history cannot be changed. When one day something really happens at home and all the relatives leave me, I will think about how much better it would be if I didn't do that in the first place.