1. There is no ownership relationship between them: Hebei Aviation Investment Group holds 0/5% shares of Xiamen Airlines, China Southern Airlines holds 5 1% shares of Xiamen Airlines, Xiamen Jianfa holds 34% shares of Xiamen Airlines, and Xiamen Jianfa does not belong to Xiamen Ye Xiang Group Co., Ltd., which means there is no relationship between them. (See Baidu Encyclopedia /view/377374.htm)

2. The relationship between them is service: the subsidiary of Xiamen Ye Xiang Group Co., Ltd. serves Xiamen Airlines Co., Ltd., including its ground service. Xiamen Airlines Co., Ltd. is like a company that produces equipment, and Xiamen Ye Xiang Group Co., Ltd. is an employee. In the words of Xiamen Ye Xiang Group Co., Ltd., "The Group governs (governs) Xiamen Gao Qi International Airport, Fuzhou Changle International Airport, Wuyishan Airport and Longyan Guanzhishan Airport, and owns (owns) 40 wholly-owned or holding subsidiaries, including/KLOC-0 listed companies, 5 Sino-foreign joint ventures and 7 other companies." (See Baidu Encyclopedia /view/7697993.htm)

I hope it helps you.