Aerial photo taken on Aug. 18, 2020 shows a self-driving bus of autopilot bus line 1 running on a road in Zhengzhou, central China's Henan Province. Combining technologies like 5G network service and artificial intelligence with smart supervision and control system, test runs of autopilot bus were held in Zhengzhou in recent days. (Xinhua/Li An)

A self-driving bus of autopilot bus line 1 runs in Zhengzhou, central China's Henan Province, Aug. 18, 2020. Combining technologies like 5G network service and artificial intelligence with smart supervision and control system, test runs of autopilot bus were held in Zhengzhou in recent days. (Xinhua/Li An)

A self-driving bus of autopilot bus line 1 runs in Zhengzhou, central China's Henan Province, Aug. 18, 2020. Combining technologies like 5G network service and artificial intelligence with smart supervision and control system, test runs of autopilot bus were held in Zhengzhou in recent days. (Xinhua/Li An)

Photo taken on Aug. 18, 2020 shows the rotating steering wheel of a self-driving bus of autopilot bus line 1 in Zhengzhou, central China's Henan Province. Combining technologies like 5G network service and artificial intelligence with smart supervision and control system, test runs of autopilot bus were held in Zhengzhou in recent days. (Xinhua/Li An)

Aerial photo taken on Aug. 18, 2020 shows a self-driving bus of autopilot bus line 1 running on a road in Zhengzhou, central China's Henan Province. Combining technologies like 5G network service and artificial intelligence with smart supervision and control system, test runs of autopilot bus were held in Zhengzhou in recent days. (Xinhua/Li An)

A self-driving bus of autopilot bus line 1 runs on a road in Zhengzhou, central China's Henan Province, Aug. 18, 2020. Combining technologies like 5G network service and artificial intelligence with smart supervision and control system, test runs of autopilot bus were held in Zhengzhou in recent days. (Xinhua/Li An)

A self-driving bus of autopilot bus line 1 is charged at a bus station in Zhengzhou, central China's Henan Province, Aug. 18, 2020. Combining technologies like 5G network service and artificial intelligence with smart supervision and control system, test runs of autopilot bus were held in Zhengzhou in recent days. (Xinhua/Li An)