A man learns about new technologies of 5G self-driving car using VR (virtual reality) devices during an experience day event in southwest China's Chongqing Municipality, Aug. 28, 2019. A two-day experience event for 5G self-driving cars kicked off in Chongqing Wednesday during the ongoing 2019 Smart China Expo. (Xinhua/Liu Chan)

Citizens try out a competition car of i-Vista Self-driving Cars Challenge during an experience day event in southwest China's Chongqing Municipality, Aug. 28, 2019. A two-day experience event for 5G self-driving cars kicked off in Chongqing Wednesday during the ongoing 2019 Smart China Expo. (Xinhua/Liu Chan)

A woman tries out virtual 5G self-driving during an experience day event in southwest China's Chongqing Municipality, Aug. 28, 2019. A two-day experience event for 5G self-driving cars kicked off in Chongqing Wednesday during the ongoing 2019 Smart China Expo. (Xinhua/Liu Chan)

A competition car of i-Vista Self-driving Cars Challenge carrying citizens runs on a road during an experience day event in southwest China's Chongqing Municipality, Aug. 28, 2019. A two-day experience event for 5G self-driving cars kicked off in Chongqing Wednesday during the ongoing 2019 Smart China Expo. (Xinhua/Liu Chan)

A contestant of i-Vista Self-driving Cars Challenge introduces new technologies and operation skills to citizens on a 5G self-driving car during an experience day event in southwest China's Chongqing Municipality, Aug. 28, 2019. A two-day experience event for 5G self-driving cars kicked off in Chongqing Wednesday during the ongoing 2019 Smart China Expo. (Xinhua/Liu Chan)

A competition car of i-Vista Self-driving Cars Challenge carrying citizens runs on a road during an experience day event in southwest China's Chongqing Municipality, Aug. 28, 2019. A two-day experience event for 5G self-driving cars kicked off in Chongqing Wednesday during the ongoing 2019 Smart China Expo. (Xinhua/Liu Chan)

Citizens prepare to get on a competition car of i-Vista Self-driving Cars Challenge during an experience day event in southwest China's Chongqing Municipality, Aug. 28, 2019. A two-day experience event for 5G self-driving cars kicked off in Chongqing Wednesday during the ongoing 2019 Smart China Expo. (Xinhua/Liu Chan)

Citizens try out 5G self-driving on a competition car of i-Vista Self-driving Cars Challenge during an experience day event in southwest China's Chongqing Municipality, Aug. 28, 2019. A two-day experience event for 5G self-driving cars kicked off in Chongqing Wednesday during the ongoing 2019 Smart China Expo. (Xinhua/Liu Chan)

A woman tries out virtual 5G self-driving during an experience day event in southwest China's Chongqing Municipality, Aug. 28, 2019. A two-day experience event for 5G self-driving cars kicked off in Chongqing Wednesday during the ongoing 2019 Smart China Expo. (Xinhua/Liu Chan)