Citizens have fun on an intelligent piano-key walkway at an AI park in Haidian District in Beijing, capital of China, on Nov. 3, 2018. An AI park co-built by Haidian authorities and Baidu, China's search engine giant, was opened to the public recently. The park is equipped with various AI facilities, such as intelligent running track, unmanned sightseeing bus and face recognition automat, offering AI experience for citizens. (Xinhua/Li Xin)