1. Central Committee of the Chinese Communist Party and State Council Guanyu renzhen zuohao disanci quanguo renkou pucha gongzuode zhishi February 28, 1982 5
2. Chinese Academy of Social Sciences, Population Research Institute Zhongguo renkou nianjian Almanac of China's population Jingji-quanli-chubanshe
3. Ministry of Civil Affairs Guanyu diaozheng sheshi biozhun he shilingdao xian tiaojian de baogao February 3, 1986 60 61