A view of a pathway built along a hilly slope leading to the entrance of a residential community in Yuzhong District, Southwest China’s Chongqing Municipality, May 22, 2019. The road is about one kilometre long, with a height of nearly 100 meters. Built on mountains, the city has been nicknamed a "mountain city", and the integration of mountainous terrain and urban construction has created a special landscape. Photo: China News Service

A view of a pathway built along a hilly slope leading to the entrance of a residential community in Yuzhong District, Southwest China’s Chongqing Municipality, May 22, 2019. The road is about one kilometre long, with a height of nearly 100 meters. Built on mountains, the city has been nicknamed a "mountain city", and the integration of mountainous terrain and urban construction has created a special landscape. Photo: China News Service

A view of a pathway built along a hilly slope leading to the entrance of a residential community in Yuzhong District, Southwest China’s Chongqing Municipality, May 22, 2019. The road is about one kilometre long, with a height of nearly 100 meters. Built on mountains, the city has been nicknamed a "mountain city", and the integration of mountainous terrain and urban construction has created a special landscape. Photo: China News Service

A view of a pathway built along a hilly slope leading to the entrance of a residential community in Yuzhong District, Southwest China’s Chongqing Municipality, May 22, 2019. The road is about one kilometre long, with a height of nearly 100 meters. Built on mountains, the city has been nicknamed a "mountain city", and the integration of mountainous terrain and urban construction has created a special landscape. Photo: China News Service

A view of a pathway built along a hilly slope leading to the entrance of a residential community in Yuzhong District, Southwest China’s Chongqing Municipality, May 22, 2019. The road is about one kilometre long, with a height of nearly 100 meters. Built on mountains, the city has been nicknamed a "mountain city", and the integration of mountainous terrain and urban construction has created a special landscape. Photo: China News Service