Photo taken with a mobile phone shows electric vehicles at a public DC charging service area in Shijingshan District of Beijing, capital of China, on July 15, 2019. (Xinhua/Ding Hongfa)

　　Photo taken with a mobile phone shows electric vehicles at a public DC charging service area in Shijingshan District of Beijing, capital of China, on July 15, 2019. (Xinhua/Ding Hongfa)

　　Photo taken with a mobile phone shows a man charging his electric vehicle at a public DC charging service area in Shijingshan District of Beijing, capital of China, on July 15, 2019. (Xinhua/Ding Hongfa)