1. China National Tobacco Quality Supervision and Test Center Zhengzhou P. R. China
2. China tobacco Yunnan Industrial Co. Ltd Kunming P. R. China
3. Sichuan Tobacco Quality Supervision and Testing Station Chengdu P. R. China
4. China tobacco Guizhou Industrial Co. Ltd Guiyang P. R. China
5. Guangdong Tobacco Quality Supervision and Testing Station Guangzhou P. R. China