The first one is to lose fat, and you will definitely eat less. The stomach is elastic and has a large range. If you are careful, you will find it. In the morning, the latitude of your stomach is generally 2-3 cm smaller than that at night, which is caused by your diet all day.
The second is that the latitude of your belly is larger than that of your thighs and arms. For example, your thigh is 55CM and your stomach is 82cm. If you lose 5cm of fat in your stomach, your thighs will lose 2-3 cm at most. Because of his different latitudes, the fat on your stomach is the easiest place to accumulate, so you will feel your stomach getting smaller first. In fact, your thighs have changed, just a little slower. Relatively speaking, changing arms will be slower.