What gifts should I buy for my mother-in-law when I travel to Chengdu?

Grandparents just send melatonin or other supplements.

If you go to your mother-in-law's house, you'd better have a good relationship with her mother-in-law from the beginning, because the average father-in-law will be more relaxed and very kind. But the mother-in-law is different, especially the mother-in-law of the only child. She feels that she has worked hard. She is bound to find fault with the daughter-in-law brought up by her son, even if she doesn't say it, she will think about it in her heart. So I think you should buy a dress or shoes for your mother-in-law and something to make her happy. Just bring some fruit after class. It also depends on the conditions at your boyfriend's home. Buy a better one if you have a big holiday. If you have a small family, it will be ordinary.