What should I eat when I travel to Yunnan?

There are many reasons for chapped lips, such as dry weather and lack of vitamin A and vitamin B, etc. Eat more foods rich in vitamins, such as carrots, animal livers, cod liver oil, tomatoes and sweet potatoes. And you can buy a better lip balm and put it on. Don't lick your lips with your tongue, or it will get drier and drier.