What was the establishment of Patent examiners?

Patent examiners is a contract worker, and there is no establishment. The Patent Examination Cooperation Center of China National Intellectual Property Administration Patent Office is divided into seven sub-centers: Beijing, Tianjin, Jiangsu, Henan, Guangdong, Sichuan and Hubei. It is a public institution with a contract period of 4 years (actual examination), and it is a self-supporting public institution. China National Intellectual Property Administration belongs to the civil service establishment. Patent Examination Cooperation Center is its subordinate unit, namely China National Intellectual Property Administration Patent Examination Cooperation Center.