First of all. What about lunch? First, drink a glass of water.
Second. Don't eat at dinner, eat cucumbers, and 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.