How about working in the National Patent Office? Prepare to apply for the mechanical invention examination department of the patent office.

If your home is not local to Beijing, I will provide you with several places that are also examiners. China National Intellectual Property Administration Patent Office has set up several examination and cooperation centers all over the country, with the same income as Beijing, but lower consumption than Beijing. It would be better if your home happened to be there. Tianjin, Zhengzhou, Wuhan, Chengdu and Jiangsu. These places have evaluation collaboration centers. You can see the websites of these centers on China National Intellectual Property Administration's website to see how to recruit examiners.