To apply for a patent, the patent application documents must be submitted. Please refer to China National Intellectual Property Administration website for details.
Writing patent application documents is a highly professional job, and applicants can generally entrust formal patent agencies to act as agents.
There are three kinds of patents: invention, utility model and design.
For inventions and utility models, it is generally necessary to prepare technical disclosure and drawings to describe the technical scheme in general, so that agents can understand and write patent application documents.
For design, it is generally necessary to prepare six photos of the product.