Noon: a small bowl of rice/a steamed bread+light cooking (eat different kinds of vegetables every day)

Evening: boiled vegetables/coarse grain rice porridge (eat a cucumber if you are not very hungry)

Pay attention to more exercise at ordinary times. As a junior high school student, you should have morning exercises, recess exercises and physical education class's. Exercise should be as good as possible. I used the above recipes a month ago, and sometimes I will adjust them appropriately. I go to work during the day and only have time to exercise at night, so I skip rope or do weight loss exercise at night. So far, I have lost about 12 kg in a month and a half. But these also vary from person to person, for reference only, I wish you success in slimming ~