CHANGZHOU ZHENGYI BIO RENEWABLE ENERGY EQUIPMENT CO., LTD. is a wholly-owned enterprise registered in Jiangsu Zhongguancun Science Park. It is mainly engaged in the research of biomass pellet fuel combustion technology and the development of new combustion equipment. Now it has developed a biomass pellet hot air furnace for agricultural use. It is widely used in grain drying, tea drying, medicinal material drying, factory heating, greenhouse heating, animal husbandry heating and other units. It has achieved remarkable results in the research and development of hot air furnaces. There are high-temperature furnaces specially for drying tea and low-temperature furnaces suitable for drying grain. The company advocates the production and operation purpose of "energy saving and emission reduction, safety and environmental protection, reliable use, and customer satisfaction". In the past few years, there are 1 invention patent (formerly Beijing Suyang Huanneng Technology Co., Ltd. technol