A chef prepares a bowl of beef noodle at a noodle restaurant in Lanzhou, capital of northwest China's Gansu Province, April 12, 2017. As a piece of name card of Lanzhou City, beef noodle is an indispensable food of local people. There are more than 1,000 beef noodle cookshops in Lanzhou and they can sell over one million bowls of beef noodle every day. (Xinhua/Chen Bin)
