You can check the Chinese trademark registration online or find an agency to help you check

The inquiry before trademark registration is very important. Many places charge a fee for trademark inquiry. I recommend it. A website is provided to you, which can be searched online for free, and you can get the results in as little as one minute. If you search "Zhiyi.com Trademark Registration Query Center" on Baidu, you can conduct trademark registration consultation and free trademark query.