An exhibitor debugs an autonomous mobile robot at the venue for 2023 Smart China Expo in southwest China's Chongqing, Sept. 3, 2023. The 2023 Smart China Expo will be held at Chongqing International Expo Center from Sept. 4 to 6. (Xinhua/Chu Jiayin)

Visitors look at a skateboard chassis used on smart vehicles at the venue for 2023 Smart China Expo in southwest China's Chongqing, Sept. 3, 2023. The 2023 Smart China Expo will be held at Chongqing International Expo Center from Sept. 4 to 6. (Xinhua/Huang Wei)

A journalist experiences an in-vehicle XR intelligent cabin at the venue for 2023 Smart China Expo in southwest China's Chongqing, Sept. 3, 2023. The 2023 Smart China Expo will be held at Chongqing International Expo Center from Sept. 4 to 6. (Xinhua/Chu Jiayin)

Guests visit the venue for 2023 Smart China Expo in southwest China's Chongqing, Sept. 3, 2023. The 2023 Smart China Expo will be held at Chongqing International Expo Center from Sept. 4 to 6. (Xinhua/Wang Quanchao)