The GB Codes of China dataset was provided by Prof. William Lavely ( Director of CITAS - China in Time and Space - Project and Associate Professor at University of Washington) and Ms. Alana Boland (Research Assistant, CITAS-University of Washington) et al.

The data were created from the sources as following:

• State Bureau of Technological Supervision, P. R. China, Codes for Administrative Divisions of China, China Standardization Press, 1980.
• State Bureau of Technological Supervision, P. R. China: Codes for Administrative Divisions of China, China Standardization Press, 1982.
• State Bureau of Technological Supervision, P. R. China: Codes for Administrative Divisions of China, China Standardization Press, 1984.
• State Bureau of Technological Supervision, P. R. China: Codes for Administrative Divisions of China, China Standardization Press, 1986.
• State Bureau of Technological Supervision, P. R. China: Codes for Administrative Divisions of China, China Standardization Press, 1988.
• State Bureau of Technological Supervision, P. R. China: Codes for Administrative Divisions of China, China Standardization Press, 1991.
• State Bureau of Technological Supervision, P. R. China: Codes for Administrative Divisions of China, China Standardization Press, 1995.
• Li Shaofeng, Zhang Ai, and Ding Yaxiang: Manual of the Codes for the Administrative Divisions of P. R. China, Science Dissemination Press, 1991.
• Chen Chao and Wang Xiguang: Manual of the Changes to the Administrative Districts of China, China Cartographic Publishing House, 1991.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1982.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1983.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1984.
• "Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1985.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1986.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1987.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1988.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1989.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1990.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1991.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1992.
• Ministry of Civil Affairs, Peoples' Republic of China, China Administrative Divisions Yearbook, China Cartographic Publishing House, 1993.