Qingdao Hisense Hitachi Air Conditioning System Co., Ltd. was established on January 8, 2003 by Hitachi Air Conditioning of Japan and Hisense Group of China, with a total initial investment of 200 million YUAN. It is a large-scale joint venture integrating technology development, product production, marketing and user service of commercial air conditioning units. It is also Hitachi's largest production base of variable frequency multilink air conditioning system outside Japan. As our first customer, Qingdao Zhongli was born from Hisense Hitachi.

Haier (Qingdao) Air Conditioning Co., Ltd. was jointly established in 1993 by Sanling Heavy Industry Co., Ltd. of Japan and Haier Group of China. It is the earliest production base of central air conditioning invested by foreign investors in China, and the investment proportion is 55% of Sanling Heavy Industry and 45% of Haier Group.

Haier (Qingdao) Air Conditioning Co., Ltd. is committed to creating the "first user reputation" central air conditioning enterprise to create the best experience in the whole process for the purpose of providing our customers with green intelligent central air conditioning leading the industry.

Hisense Group is a super large electronic information industry group company, established in 1969, with the development strategy of "establishing enterprise through technology and stable operation". It has more than 20 subsidiaries. HISENSE has HISENSE electric (600060) and HISENSE kelon (00921) respectively, deep, Hong Kong, Hong Kong and listed companies in Shanghai, hold HISENSE HISENSE, more than 130 countries in Africa, southeast Asia and other regions, in places such as South Africa, Algeria, Egypt, has a production base, in the United States, Europe, Australia, Japan and other places has sales organization.

Bosch is one of Germany's largest industrial companies, engaged in automotive technology, industrial technology and consumer goods and building technology industries. In November 2014, Bosch home Appliances was successfully listed in Shanghai, and has successively entered Beijing, Shanghai, Jiangsu, Zhejiang, Guangdong and other 22 provinces (cities), achieving good sales.