Request (application form can be downloaded from China National Intellectual Property Administration website), application documents (instructions, claims, drawings, abstracts and drawings), application fee and publishing and printing fee (which can be paid within two months).
Applying for a patent is a very complicated legal procedure. As you know nothing about this, I suggest you entrust a patent agency to help you apply, including writing application documents.
You have to pay to apply for a patent. The official application fee is only a few hundred yuan, while the entrusted agent ranges from several thousand to more than ten thousand. In order to successfully authorize and stabilize subsequent rights, it is necessary to entrust an agency.