-First of all, you must have a big breakfast.

First of all. What about lunch? First, drink a glass of water.

Second. When eating, don't eat, eat cucumbers. If you feel that cucumbers are not full, you can eat whole wheat bread first, but you should chew slowly. Never eat after 8 o'clock.

If you are hungry a few hours after a meal, drink water and boiled water.

Third. Choose a sport. Exercise for 2 hours in the morning and 2 hours in the afternoon. Besides, don't sit after dinner. Get up and walk for about 15 minutes.