2017 Mobile World Congress Americas held in San Francisco
2017-09-13 09:07:00

People visit the 2017 Mobile World Congress Americas (MWCA) in San Francisco, the United States on Sept. 12, 2017. 2017 Mobile World Congress Americas is held here from Sept. 12 to Sept. 14. (Xinhua/Wu Xiaoling)

Source: Xinhua Editor: Angela