Group 1 - The State Intellectual Property Office of China granted a patent for an "Axial Heat Transfer System to Mitigate Thermal Stratification Effects in Nuclear Power Plants" to several companies including Shenzhen CGN Engineering Design Co., Ltd. and China General Nuclear Power Group [1] - Shenzhen CGN Engineering Design Co., Ltd. was established in 2005 with a registered capital of 79.36 million RMB and has participated in 1,479 bidding projects, holding 1,267 patents [1] - CGN Engineering Co., Ltd., founded in 1997, has a registered capital of 3.886 billion RMB, participated in 5,000 bidding projects, and holds 3,678 patents [1] Group 2 - Yangjiang Nuclear Power Co., Ltd., established in 2005, has a registered capital of 1.5506 billion RMB and has participated in 5,000 bidding projects, holding 1,013 patents [2] - China General Nuclear Power Group, founded in 1994, has a registered capital of 14.87337 billion RMB, participated in 1,382 bidding projects, and holds 5,000 patents [2] - China General Nuclear Power Corporation, established in 2014, has a registered capital of 50.49861 billion RMB, participated in 337 bidding projects, and holds 5,000 patents [2]