Domestic: Shanghai Chai, Weifang Electric Power and Yuchai are all good. It's almost the same as that imported, but the appearance is rough, and there is no difference without long-term use.
However, it should be noted that Shangchai and Wei Chai are divided into general factory and branch factory. The branch factory is a small factory that uses China's naming habit to fish in troubled waters. Weifang is called Wei Chai, and Shanghai is called Shangchai. The quality of these small factories is uneven and it is difficult to guarantee. There is a big gap in the quality of production in different periods in the same factory, and there are many minor problems.
Many domestic factories have joint ventures with foreign countries, so there is no technical problem, and some will be used on their own machines. Joint ventures include Wei Chai Steyr, Deutz, Chongqing/Dongfeng Cummins and Perkins. All the above are diesel engines (main engines). Because most OEMs don't produce units, most of them are assembly plants in the market, so it is difficult to say the brand of units in China. It's hard to say that the configuration of motor and electrical components is different in the same factory.