If you are an applicant who has been holding the post of professor or associate professor or enjoying an equal treatment in a key institute of higher learning in Beijing for at least four consecutive years upon application and prior to the date of application, with a cumulative period of residence in China no less than three cumulative years within the four years and with a good tax paying record, then you can apply for permanent residence permit by following the steps below.
SHIJINGSHAN DISTRICT PEOPLE'S GOVERNMENT OF BEIJING MUNICIPALITY