Astro Low-Altitude Express Co., Ltd. (hereinafter referred to as Low-Altitude Express) is a wholly-owned subsidiary of Astro Air headquartered at the China Star Base in Huizhou City, and has operation support bases at Xiaogui Bay in Huizhou, Nantou Airport and Dapeng New District in Shenzhen, and other places. The company is mainly engaged in aviation infrastructure construction, helicopter charter flights, helicopter external load flights, air tours, medical rescue, aircraft escrow, private pilot license training, etc. It is the pioneer of the domestic CBD helicopter FBO. With the helicopter low-altitude flight network covering major cities in the Pearl River Delta region such as Hong Kong, Macau, Guangzhou, Shenzhen, Zhuhai and Chaoshan, Astro Air provides customers with the Pearl River Delta helicopter intercity connecting flight service in a fast and efficient way.