1. Observe the height of the neckline: Specifically, you can place the sweater flatly on the bed, and then distinguish it by observing the height of the neckline. Generally, the low neckline is from the front, and the high neckline is from the back.

2. Observe the position of the trademark: Specifically, you can pick up the sweater and look through the trademarks inside. Generally, the one with the trademark is on the back, and the one without the trademark is on the front.

3. Observe the decoration on the sweater: Generally, the front of the sweater has more decorations than the back, such as patterns, pockets, buttons, etc.

Extended information:

Precautions for wearing sweaters:

1. Because most sweaters are knitted products, you should try to avoid them when wearing them. Come into contact with sharp objects to avoid being scratched.

2. When cleaning sweaters, you should try to use professional sweater detergents, because sweater detergents are relatively soft and will not easily damage clothes.

3. When cleaning, you should try to gently rub the collar, cuffs and other dirty areas of the sweater. Do not scrub hard to avoid pilling of the sweater.

4. Once the sweater pills, do not pull it off directly with your hands, because this will only make the sweater pilling more serious.