A small bag of rice, laver, mushrooms, sauerkraut (small bag), day lily (dry goods, also called golden tip), and some scallops, a small bag of salt, a small bag of monosodium glutamate or chicken essence, and a bottle of vegetable oil can also be prepared. Practice: The premise is that the school has a public steamer. Take a proper amount of rice and put it in the lunch box. Add laver, scallop, sauerkraut (half a small bag is too sour, according to personal taste), two small mushrooms (shredded) and a few day lilies, then add water, salt, monosodium glutamate and oil and stir. Then cover it and take it to the steamer in the canteen. Take it out after class.