Morning: Drink a cup of boiled water first when you get up (gastric lavage is good for your health), and then you must have breakfast, otherwise you will have a stomachache later. Lunch: You can have a big lunch. You should mainly eat vegetables and eat less rice and meat. You can also drink some soup before eating, so you won't eat too much when you are full. Dinner: It's similar to lunch, but you can't eat too much, as long as you don't feel hungry.