You are sure to get fat. You can eat 1 bean paste buns, an apple and a bottle of milk in the morning. You can eat more lunch, because the sun is strong at this time, which is the easiest time to digest in a day. You can eat three steamed stuffed buns with sesame sauce, one steamed stuffed bun with bean sauce, chicken, and preferably chicken soup. You can't eat too little at night. You can eat 200 grams of jelly, an apple and some steamed bread by the way. (You can also look at the Huangdi Neijing, which says that people's daily diet and routine are quite detailed.