An attendant is seen on a train of the Guangzhou-Shenzhen-Hong Kong Express Rail Link (XRL), in Hong Kong, south China, Aug. 16, 2018. The trial run of the Hong Kong Section of XRL has been completed on Thursday. The 26-km Hong Kong section of the XRL links up Hong Kong with the mega high-speed rail network of the Chinese mainland. (Xinhua/Lui Siu Wai)