Hello! An American lawyer will answer you:

Trademark infringement is a very complex legal issue. Trademark registration is territorial, and a trademark registered only in China does not mean it is globally valid. However, although registration in China is not directly valid in the United States, depending on the circumstances of the case, qualified U.S. lawyers may still defend the client based on registration in China and strive for the most favorable results. In addition, in some cases, lawyers may also seek priority for the client to use the trademark in the United States or other countries based on the Chinese registration.

In trademark infringement cases seized by U.S. Customs, depending on the specific circumstances of the case, qualified U.S. lawyers may challenge the U.S. Customs’ seizure fine decision from different legal angles and help the parties obtain the return of the goods and exemption from fines. Or at least minimize the penalty. U.S. Customs cases often have strict time limits, and some cases may involve criminal liability if not handled quickly. Therefore, the owner of the seized goods is best to find a U.S. lawyer who is qualified and capable of handling U.S. customs seizure cases as soon as possible to handle the case within the specified time limit in order to reduce losses to the greatest extent.

Disclaimer: The above discussion does not represent legal opinions on individual cases, does not form a lawyer-client relationship, and cannot replace consulting and entrusting a qualified U.S. lawyer to obtain effective help for individual cases.