Yantai Jiayou Technology Co., Ltd., located in the beautiful port city of Yantai Development Zone, a coastline of 20 kilometers, bordering the Jinsha Beach, nestled against the blue sea, with distinct seasons and a pleasant climate. The company was established 2007, and Yantai Jiayou is dedicated to the development and research of refrigeration and heating universal valves, with main products including electric-way valves, non-pressure loss check valves, and defrost valves in three major series. These three types of products have extremely low fluid resistance, which significantly improves energy, and they are also the earliest products in China to be studied, tested, used, and mass-produced. The products are widely used, with customers spread all over country, and the market has been verified for more than 10 years. In the research of air conditioning valve control and the development of low-flowresistance valves, has always been at the forefront of technology. The company currently has more than 40 employees, a factory area of 5,000 square meters, more than 40 sets of equipment. The company’s products have been adopted by Gree Air Conditioning (Zhuhai, Hefei, Changsha) and Controls (York Guangzhou, Wuxi), Yantai Dunham Bush (China), Yantai Renyuan Air Conditioning, Yantai Binglun, Chongqing Midea, Qingdao Haier, Zhejiang Guoxiang, Shanghai Clemens, Trane Air Conditioning, Carrier Air Conditioning, and other users. Yantai Jiayou has always adhered to the quality policy of "people-oriented, quality first", with a complete quality control system. In2019, it passed the ISO9001 quality system certification and obtained the occupational health and safety management system certification certificate, quality management system certificate, 14000 environmental management system certificate. Yantai Jiayou has in-depth research in high-performance, low-energy consumption refrigeration and heating universal. Now the company has obtained 2 US invention patents, 2 German and Japaneseinvention patents each, and 11 Chinese invention patents, and 20 utility models.