Passengers go through the procedure of 24/144-hour International Transfer at the Terminal 3 at Beijing Capital International Airport in Beijing, capital of China, Dec. 28, 2017. China on Thursday extended its visa-free period for people transitting through Beijing to 144 hours, and added neighboring Hebei Province and Tianjin City to the program. Transit air, train, and ship passengers entering either of the six border ports in Beijing, Tianjin and Hebei can stay in the region for six days before heading for another destination, according to Beijing's Port Office. (Xinhua/Luo Xiaoguang)