Yan Gao Xu

Zhejiang Dun'an Energy Saving Technology Co. Ltd. engages in the energy conservation and environmental protection services. It develops energy-saving & environmental protection technology and provides green & new energy technology solutions, energy integrated cascade utilization & clean energy development, green energy supply management. The company was founded on December 24, 2014 and is headquartered in Hangzhou, China.

Dun'an (Tianjin) Energy Saving System Co., Ltd. provides energy conservation and environmental protection services. Its business activities include environmental protection technology development, energy technology development and consulting, mechanical and electrical equipment installation engineering, heating and cooling engineering design and construction, energy management contracting services, energy-saving diagnosis and services, sale of machinery and hardware, and sale of coal and thermal energy. The company was founded on March 17, 2011 and is headquartered in Tianjin, China.

Jiangsu Dart Wind Machine Co., Ltd. engages in the manufacturing, sales, and installation of fans. Its business scope includes axial, centrifugal fans, air conditioning, and refrigeration equipment; and design, technical consultation, and service of non-standard fan. The company was founded on March 2, 1998 and is headquartered in Nantong, China.