Article 19 of the Civil Service Law of People's Republic of China (PRC) is set below the bureau level. The rank sequence of comprehensive management civil servants is divided into: first-class inspector, second-class inspector, first-class researcher, second-class researcher, third-class researcher, fourth-class researcher, first-class chief clerk, second-class chief clerk, third-class chief clerk, fourth-class chief clerk, first-class clerk and second-class clerk. The rank sequence of civil servants in positions other than comprehensive management shall be stipulated separately by the state in accordance with this law. Disabled Persons' Federation, China Disabled Persons' Federation, was established in March, 1988. It is a people's organization composed of disabled people, their relatives and friends, and disabled workers. It is a unified organization of all kinds of disabled people in China.