First of all, adjust your diet, balance your nutrition, don't overeat, don't have a partial eclipse, and don't eat before going to bed.
Make an exercise plan according to your own situation. The following exercise plan is for your reference:
-Running for 40 minutes in the morning;
-Skipping rope 1000 times;
-Squats 150 times, 30 in a group and 5 in groups;
-Sit-ups and sit-ups 150 legs each, in groups of 30, and each group rotates once for two movements;
-Push-ups, 100 pull-ups, in groups of 20, and each group rotates once for two movements;
As mentioned above, keep exercising and pay attention to diet, and you can see obvious effects in 15 days.