(1) China National Intellectual Property Administration, China
Website: /sipo/zljs/default.htm
(2) China Patent Information Center
Website:/
If you want to obtain the full text of the patent, you need to go to China National Intellectual Property Administration, China to consult it, or you can handle it through CSDL interlibrary loan and original text delivery system, or you can directly entrust the document supply room of the Document Information Center of China Academy of Sciences to search it.
Yike Patent Center answers your questions, hoping to help you!