What is the best product sold by WeChat business in your circle of friends?

The most "awesome" product sold by WeChat merchants in my circle of friends is skin care products. They often play their skin care products well and the effect is obvious. Many people have tried it, and it has a good reputation and will produce many pictures. The pictures they trade will make us feel that these products are really hot and branded as international high-end brands. However, after using it, we will find that this kind of skin care product is particularly rubbish and particularly bad. Let our skin appear some allergic phenomena, and its water emulsion is particularly greasy, which is really unacceptable at all. I feel that some WeChat merchants are particularly black-hearted, and they can actually play such a good banner for such a thing. I feel that such people are very "cow".