1. China statistical yearbook;National Bureau of Statistics of the PR China,2005
2. Ministry of Public Security of the PR China (MPS). The vehicle population in China reached 154 million, ranking World No. 2. http://www.sn.xinhuanet.com/2014-11/28/c_1113440596.htm. Xinhua Net, Beijing, PR. China.
3. Ministry of Industry and Information Technology of the PR China (MIIT).The vehicle population in China will exceed 200 million in 2020. http://news.xinhuanet.com/auto/2010-09/05/c_12520150.htm. MIIT, Beijing, PR China.
4. CNPC. The increased oil imports are consumed by new cars. http://wap.cnpc.com.cn/system/2013/04/10/001421739.shtml. CNPC, Beijing, PR China.
5. China land and resources statement;Ministry of Land and Resources of the PR China (MLR),2013