Mobile photo taken on Aug. 3, 2019 shows people enjoying themselves under the installation artwork "Sun Cycle" displayed at Wangfujing, Beijing, capital of China. The artwork "Sun Cycle" is displayed at WF Central, a shopping mall in Wangfujing, from May 29 to Aug. 31. (Xinhua/An Xiya)

Mobile photo taken on Aug. 3, 2019 shows people enjoying themselves under the installation artwork "Sun Cycle" displayed at Wangfujing, Beijing, capital of China. The artwork "Sun Cycle" is displayed at WF Central, a shopping mall in Wangfujing, from May 29 to Aug. 31. (Xinhua/An Xiya)

Mobile photo taken on Aug. 3, 2019 shows the installation artwork "Sun Cycle" displayed at Wangfujing, Beijing, capital of China. The artwork "Sun Cycle" is displayed at WF Central, a shopping mall in Wangfujing, from May 29 to Aug. 31. (Xinhua/An Xiya)

Mobile photo taken on Aug. 3, 2019 shows the installation artwork "Sun Cycle" displayed at Wangfujing, Beijing, capital of China. The artwork "Sun Cycle" is displayed at WF Central, a shopping mall in Wangfujing, from May 29 to Aug. 31. (Xinhua/An Xiya)

Mobile photo taken on Aug. 3, 2019 shows the installation artwork "Sun Cycle" displayed at Wangfujing, Beijing, capital of China. The artwork "Sun Cycle" is displayed at WF Central, a shopping mall in Wangfujing, from May 29 to Aug. 31. (Xinhua/An Xiya)

Mobile photo taken on Aug. 3, 2019 shows people enjoying themselves under the installation artwork "Sun Cycle" displayed at Wangfujing, Beijing, capital of China. The artwork "Sun Cycle" is displayed at WF Central, a shopping mall in Wangfujing, from May 29 to Aug. 31. (Xinhua/An Xiya)

Mobile photo taken on Aug. 3, 2019 shows the installation artwork "Sun Cycle" displayed at Wangfujing, Beijing, capital of China. The artwork "Sun Cycle" is displayed at WF Central, a shopping mall in Wangfujing, from May 29 to Aug. 31. (Xinhua/An Xiya)

Mobile photo taken on Aug. 3, 2019 shows people enjoying themselves under the installation artwork "Sun Cycle" displayed at Wangfujing, Beijing, capital of China. The artwork "Sun Cycle" is displayed at WF Central, a shopping mall in Wangfujing, from May 29 to Aug. 31. (Xinhua/An Xiya)