There are different ways to find a reliable supplier in China. We won't go into details in this short answer but basically, you might find one on a website such as Alibaba, Taobao, 1688... Unfortunately, there is a high probability of facing a trap (regarding compliance or the product directly). You can also go directly into a fair trade to find them but it is much more difficult since the beginning of the covid19 and the digitalization of the business. Finally, you can ask the help from a sourcing (or procurement) agent such as DocShipper. We will be able to assist you on the process from A to Z including additional services like quality control, compliance checking, international logistics...