The story
Zhongyuan Airlines was established on 15 May 1986 as a regional airline serving China's Zhongyuan (central plains) region. By August 2000, the Civil Aviation Administration of China and Henan provincial government approved the acquisition of Zhongyuan Airlines by China Southern Airlines, increasing the airline's presence in the Henan province. It was acquired by China Southern Airlines on 4 August 2000.
From Wikipedia’s article on Zhongyuan Airlines, shared under CC BY-SA 4.0.3
