Hunan Changsha Zhiyuan Air Conditioning Co., Ltd. is located in Changsha, Hunan. It is a company that masters intelligent air conditioning technology. Its main products are household air conditioners and office air conditioners. Compared with similar products, Zhiyuan's Land series has the advantages of low energy consumption, high reliability, multi-function, easy management and long life, and is widely welcomed by users. Because it does not use CFCS as a refrigerant and has the extension of cold, heat and electricity cogeneration technology, it is recognized as one of the ways for the sustainable development of building energy systems in the future. The company manages science and strictly implements the “total quality management” system. The management system specifies quality indicators for the company's products and components. It also imposes strict requirements on optimizing the company's production process and organizational structure. In the factory area of more than 60,000 square meters, the office area is civilized, modern and efficient; the manufacturing area is bright, clean and orderly; the living area is elegant, quiet, green grass, and full of civilization