OEM Questions / from China...

I'd recommend (if not already done) looking into filing for the trade mark in China.

Even if the manufactured goods are not intended for sale in China, the resulting trade mark registration can be used to attack counterfeits made in the Chinese Market and sold or being made for export (you record the trade make registration before Chinese customs so can block the export of the counterfeit- assuming it bears your trade mark).

Depending on what the product is, also consider design protection.

If there is a novel invention to the product, then it may qualify for patent protection too.

Overall, it's a question of control and ownership of your IP and stopping others being able to use it without them facing an infringement risk.

Just flagging the above since many think (incorrectly) that you only need to protect the IP of goods in the market in which they are sold. It should also be protected in the country in which they ate being manufactured.

I can recommend an excellent IP firm in China if you want to get some advice from them.