1. Huadian Environmental Protection Technology Co., Ltd.: An environmental protection company under Huadian Group, it is one of the important contractors of the desulfurization general contracting business of Huaneng Power Plant.
2. China Nengjian Group Co., Ltd.: A state-owned enterprise, it is one of the leading enterprises in the field of power engineering construction in China, and also one of the important contractors of the desulfurization general contracting business of Huaneng Power Plant.