1 week can only be achieved by liposuction. You are still so young, there are many ways to lose weight in the future, so don't worry for the time being.
In fact, as long as you control your diet reasonably, increase a certain amount of exercise, develop good living habits, and add some auxiliary acupoint massage, you will definitely lose weight.
Meat does not grow in a day, and it will not disappear in a day. It is recommended to get up every morning and drink 1 cup of lemonade or light salt water to clear the intestines. Normal breakfast and lunch, eating less fruit at dinner, not eating snacks and high-calorie and high-fat foods, plus some exercise, will naturally make you slim down, but it takes a process and perseverance is very important.
I wish you an early success!