1. If you go for a certain brand when you buy it, but there is no trademark after you buy it, it means that what you bought is pirated and fake. In this case you can apply for a refund.
2. If a piece of clothing has nothing on the washing label, it is considered a street stall product without a brand. If you are concerned, you can return it. After all, the safety of Sanwu products is not guaranteed.