Group 1 - The State Intellectual Property Office of China granted a patent titled "Line Pressure Device and Air Conditioner with It" to Qingdao Haier Air Conditioning Co., Ltd., Qingdao Haier Air Conditioning Electronics Co., Ltd., and Haier Smart Home Co., Ltd. The patent authorization announcement number is CN114923259B, with an application date of April 2022 [1] - Qingdao Haier Air Conditioning Co., Ltd. was established in 1996, located in Qingdao, with a registered capital of 93,638.162532 million RMB. The company has invested in 19 enterprises, participated in 3,689 bidding projects, and holds 259 trademark records and 5,000 patent records [1] - Qingdao Haier Air Conditioning Electronics Co., Ltd. was established in 1999, also located in Qingdao, with a registered capital of 96,709.088914 million RMB. The company has invested in 15 enterprises, participated in 4,419 bidding projects, and holds 127 trademark records and 5,000 patent records [1] Group 2 - Haier Smart Home Co., Ltd. was established in 1994, located in Qingdao, with a registered capital of 943,811.4893 million RMB. The company has invested in 58 enterprises, participated in 1,724 bidding projects, and holds 285 trademark records and 5,000 patent records [2]