1. 1. Mianyang Yearbook, 2007. Editorial office of the Mianyang Yearbook. Chengdu: Sichuan Science and Technology, 2007, 12.
2. 2. Statistical Bulletin of Mianyang National Economic and Social Development in 2007. See: URL: http://www.jiangyou.gov.cn/bmwz/942947769050464256/20080318/272212.html.