Look at the seller's word of mouth. Please turn over a few pages of comments. If the buyer has a good impression on the owner's reputation, trust him for the time being. If you find that the problem is too serious to use after receiving the goods, you would rather pay the freight yourself. I suggest you save the chat records and screenshots on Ali Want Want. Look at the seller's reputation and after-sales service guarantee before buying something, such as unconditional return within seven days, insurance card or warranty card. Online shopping is very common, but if you want to buy something good and cheap, you need your own eyes to find it.