By the way, patents protect technical contents, products or methods or uses that can be used and produced in industry.
Copyright is automatically generated without registration. If you can prove that you created it yourself, you don't need any registration.
But in order to reduce unnecessary troubles in the future, I suggest you apply for copyright protection at China Copyright Protection Center. The telephone number is 0 10-68003887. Chegongzhuang in Xizhimen.
The specific address can be searched online. In addition, if you are not in Beijing, you can consult the local copyright bureau for registration.