| Factors | Symbol | Meaning | Source |
| China’s GDP | GDP | The total GDP of China’s Provinces, Municipalities directly under the central government and Autonomous region | National Bureau of Statistics http://www.stats.gov.cn/tjsj/ndsj/ |
| Technical barriers to trade | TBT | The total number of technical trade barriers announced by the EU, the United States and Japan | WTO http://tbtims.wto.org/ |
| Foreign direct investment | FDI | Foreign direct investment used by China’s Provinces, Municipalities directly under the central government and Autonomous region | National Bureau of Statistics http://www.stats.gov.cn/tjsj/ndsj/ |
| Rate | R | RMB against USD (Annual average) | National Bureau of Statistics http://www.stats.gov.cn/tjsj/ndsj/ |
| Fixed-asset investment | FI | Fixed-asset investment in China’s Provinces, Municipalities directly under the central government and Autonomous region | National Bureau of Statistics http://www.stats.gov.cn/tjsj/ndsj/ |