Aerial photo shows a view of a pavement at the former site of Chongqing Iron &Steel Factory in Dadukou District of southwest China's Chongqing Municipality, Feb. 15, 2022. The pavement is one of the 60 characteristic pavements planned by local authorities in the mountainous city of Chongqing. (Xinhua/Wang Quanchao)

Aerial photo shows tourists walking on a pavement at the former site of Chongqing Iron &Steel Factory in Dadukou District of southwest China's Chongqing Municipality, Feb. 15, 2022. The pavement is one of the 60 characteristic pavements planned by local authorities in the mountainous city of Chongqing. (Xinhua/Wang Quanchao)

Tourists pose for a group photo on a pavement at the former site of Chongqing Iron &Steel Factory in Dadukou District of southwest China's Chongqing Municipality, Feb. 15, 2022. The pavement is one of the 60 characteristic pavements planned by local authorities in the mountainous city of Chongqing. (Xinhua/Wang Quanchao)

Aerial photo shows a view of a pavement at the former site of Chongqing Iron &Steel Factory in Dadukou District of southwest China's Chongqing Municipality, Feb. 15, 2022. The pavement is one of the 60 characteristic pavements planned by local authorities in the mountainous city of Chongqing. (Xinhua/Wang Quanchao)

A child walks on a pavement at the former site of Chongqing Iron &Steel Factory in Dadukou District of southwest China's Chongqing Municipality, Feb. 15, 2022. The pavement is one of the 60 characteristic pavements planned by local authorities in the mountainous city of Chongqing. (Xinhua/Wang Quanchao)