皇冠体育app

A drone flies at a railway station in Guangzhou, Guangdong province. This year, the Guangzhou Railway Corporation became the first in 皇冠体育app to introduce "smart travel technologies", which include automated check-ins ("face recognition"), robot assistant, Spring Festival travel calendars, and the "6C system" (a power supply monitoring system for high-speed rail). [Photo/news.china.com.cn]