Photo taken on Nov. 12, 2020 shows an unmanned delivery car displayed at the 2020 World Intelligent Connected Vehicles Conference held in Beijing, capital of China. The three-day conference kicked off here on Wednesday. (Xinhua/Ren Chao)

Photo taken on Nov. 12, 2020 shows an electric car displayed at the 2020 World Intelligent Connected Vehicles Conference held in Beijing, capital of China. The three-day conference kicked off here on Wednesday. (Xinhua/Ren Chao)

Photo taken on Nov. 12, 2020 shows a hydrogen-powered car displayed at the 2020 World Intelligent Connected Vehicles Conference held in Beijing, capital of China. The three-day conference kicked off here on Wednesday. (Xinhua/Ren Chao)

Photo taken on Nov. 12, 2020 shows an electric car displayed at the 2020 World Intelligent Connected Vehicles Conference held in Beijing, capital of China. The three-day conference kicked off here on Wednesday. (Xinhua/Ren Chao)

Photo taken on Nov. 12, 2020 shows the scene of the 2020 World Intelligent Connected Vehicles Conference held in Beijing, capital of China. The three-day conference kicked off here on Wednesday. (Xinhua/Ren Chao)