Bagged Yili or Mengniu can be drunk half an hour before going to bed. Before drinking, it is best to pad your stomach, eat some whole wheat bread or cookies, and heat your stomach a little. (Not too hot, but a little.)

Just moderate, remember not to drink for a long time.

If it is a long-term insomnia, milk alone is not the way, then we must think of other ways.

Good luck!