I don't think IP rights is spelled out in traditional (old) Chinese legal systems. Their traditional way to protect IP is to keep it a trade secret. Copying is a form of compliment, acknowledgement that you are better.
Except that on December 11, 2001, China became a member of the WTO. And the WTO has very clear regulations on IP protections. But China has a notorious track record when it comes to compliance with WTO rulings.
The EU and the US have filed formal complaints against China with the WTO about IP protections and forced IP transfer. The complaints are extensive and the evidence presented is substantial. But even with a favorable WTO ruling there is precious little confidence that China would comply with any ruling. What China says and what they actually do are two very different things.
In essence, China is destroying the WTO.