The diet is like this. Breakfast does not move. For Chinese food, you can use some chicken, beef and fish. These meats are good for you to lose weight and keep healthy. If you are a vegetarian, you can eat more fiber-rich vegetables. Like wax gourd, celery, mung bean sprouts and so on. It is best to switch to coarse grains and fruits and vegetables at night. Like corn, whole wheat bread, soda crackers, tomatoes, cucumbers, apples and so on. Remember to eat early and eat less at dinner. Don't eat anything after supper. Try not to touch carbonated drinks, snacks and barbecues.
The main sports are skipping, jogging and leapfrog. No need to carry a load. Often.
It's hard to lose weight, so you must stick to it. 40 kg for two months is a bit difficult. But 20/30 kg is not a problem.