Keller Environmental Technology (Shanghai) Co., Ltd. (hereinafter referred to as "Keller"), founded in 2010 in Shanghai, China, focuses on "intelligent" high, sophisticated and cutting-edge technology products in the field of environmental science and technology. not only provide customers with excellent and safe high-performance products, but also provide professional and personalized ventilation and cooling solutions according to their different needs. Keller will introduce HVLS fan products into China, develop it into a new industry, and continue to drive the development and prosperity of the industry. The company is mainly engaged in the research and development, production, sales, installation and related technical services of HVLS fans. Since the establishment of the company, the main business has not changed significantly.