TOPSHOT - A passenger takes a selfie next to the first train of the Guangzhou-Shenzhen-Hong Kong Express Rail Linkas after it arrived in Shenzhen on September 23, 2018. - A new high-speed rail link between Hong Kong and mainland China launched on September 23, a multi-billion dollar project that critics say gives away part of the city's territory to an increasingly assertive Beijing. (Photo by TYRONE SIU / POOL / AFP)