Whether the trademark is lost or not, it is not the most important thing. The most important thing is that the merchant's service attitude and your return attitude depend on how you communicate. You discuss with the other party. If the product does not have major defects, you may need to pay for the round-trip shipping. Otherwise, Taobao will not be able to do it, and they will not agree. You have to understand this. If you can accept the exchange, exchange is almost the best result. You are satisfied and the other party is also satisfied. By the way, another issue cannot affect secondary sales. As for the trademark issue, you may talk to the other party. This should not affect secondary sales. Good luck.