The most important things you can do to protect your IP rights in China are:
Stick to your normal business instincts
Do as much as you can to prevent infringements in the first place - prevention is better than the cure
Assess the risks of the market and make preparations
Take self-help measures to protect your IP
Make sure everyone in your business values its IP, including you
Register your IP rights
Create good relationships with organisations that can help you
Consider mediation before defensive action
Once beyond mediation, civil litigation has a much more potent deterrent effect than administrative enforcement