I suggest you know whether you are fat or not first. Is there a lot of muscle and little fat? If you are muscular, you won't lose it. If you want to be thin, you should lose fat.

If you have a lot of fat, then you are fat. You can check your body fat rate.

Let's take a look at my data screenshot first. My weight is 170.6, but I am moderately obese. I have too much fat and a high body fat rate.

So I'm fat. You can also download one? Change the APP and set up a body fat scale of Tsinghua Tongfang on JD to measure your body data.