The first echelon; Shanghai Electric Machinery Factory Xiangtan Electric Machinery Factory Harbin Electric Dongfang Electric (a large state-owned enterprises)
The second echelon: CLP Electric Wolong Electric Jiamusi Electric (a large listed company)
The third echelon: Wannan Electric Vantage Motor Ximas Electric Great China Electric Yinglong Electric (private enterprises)
Another: other brands of motors on a lot of, such as Zhongda motor Changsha motor Hengshui motor Pinxing motor
The above brands are more stable and reliable quality, each with their own strengths, I hope my answer can help you!