Poor performance. The operating income of Yangming intelligent fan decreased by 6.53% and 20.34% respectively. Coupled with the poor performance of the US stock market, Yang Ming Intelligent chose to privatize and delist in July 20 16. "Delisting refers to the situation that a listed company actively or passively terminates its listing because it fails to meet other listing standards such as exchange finance, that is, it changes from a listed company to a non-listed company.