2, precautions, it depends on whether you are selling real goods or fakes. Ten thousand customers come here and there are many simulated brand-name foods, such as Master Kong, and so on. Anyway, as long as there is something on the market, he has it. Personally, the most important thing is to ask the real and fake goods when buying, and let them give you the real and fake ones.
3, you should not return goods, especially food, unlike you going to the commodity city to buy toys or something.