What is a junk customer?

Make trouble without reason. Unreasonable customers belong to junk customers. Another bad review didn't say the goods were received, and then the seller contacted the customer who asked for cash back. As long as it can't be delivered at the specified time (such as orders delivered at 2 am and 5 pm), it will give a bad review and write down irrelevant things. For example, if there is no quality problem, he will say that the quality is not good and then blackmail the seller.