1. Fansen Mechanical and Electrical Company, Niuxu Mechanical and Electrical Company;
2. Changfeng Mechanical and Electrical Company, Qijing Mechanical and Electrical Company;
3. Qichen Mechanical and Electrical Company Company, Weilian Mechanical and Electrical Company;
4. Jingbang Mechanical and Electrical Company, Ruituo Mechanical and Electrical Company;
5. Boan Mechanical and Electrical Company, Fanchuang Mechanical and Electrical Company;
6. Hengqi Mechanical and Electrical Company, Puli Mechanical and Electrical Company;
7. Sidi Mechanical and Electrical Company, Heqi Mechanical and Electrical Company;