Why is Tianjin Airlines owned by HNA cheap?

Short route Tianjin Airlines is a member of HNA Group, one of the world's top 500 airlines, and belongs to low-cost airlines. The main reason for its low cost is that its route is short and its destinations are relatively concentrated, so its whole flight ticket price is relatively cheap. Tianjin Airlines was established on June 8, 2009, with its headquarters in Tianjin, and its main operating bases are Tianjin Binhai International Airport and Xi Xianyang International Airport.