As far as what you just said is concerned, it does not belong to trademark infringement. Infringement of trademark rights must be confused. Although you can use' Youyou' to search for the brand of' Youyou', the buyer who really needs to buy' Youyou' can completely exclude the seller of' Youyou' literally, so it does not constitute infringement of trademark rights.

The direct use of "Youyou" may constitute trademark infringement, but you still need to submit the certificate of your registered trademark as an attachment, and indicate that the scope of application of the trademark is clothing, and you don't have this style of clothing in that company, which proves that the merchant is using the trademark fraudulently, which should be possible.