Aerial photo taken on March 10, 2021 shows tourists visiting the ancient city of Shuangjiang in the Tongnan district of Chongqing, southwest China. The Ancient City of Shuangjiang, located in Tongnan District in Chongqing, was built at the end of the Ming Dynasty (1368-1644) and the beginning of the Qing Dynasty (1644-1911). In recent years, the local authority has restored the city to its original appearance (Photo: Xinhua)

Aerial photo taken on March 10, 2021 shows tourists visiting the ancient city of Shuangjiang in the Tongnan district of Chongqing, southwest China. The Ancient City of Shuangjiang, located in Tongnan District in Chongqing, was built at the end of the Ming Dynasty (1368-1644) and the beginning of the Qing Dynasty (1644-1911). In recent years, the local authority has restored the city to its original appearance (Photo: Xinhua)

Aerial photo taken on March 10, 2021 shows tourists visiting the ancient city of Shuangjiang in the Tongnan district of Chongqing, southwest China. The Ancient City of Shuangjiang, located in Tongnan District in Chongqing, was built at the end of the Ming Dynasty (1368-1644) and the beginning of the Qing Dynasty (1644-1911). In recent years, the local authority has restored the city to its original appearance (Photo: Xinhua)

Aerial photo taken on March 10, 2021 shows tourists visiting the ancient city of Shuangjiang in the Tongnan district of Chongqing, southwest China. The Ancient City of Shuangjiang, located in Tongnan District in Chongqing, was built at the end of the Ming Dynasty (1368-1644) and the beginning of the Qing Dynasty (1644-1911). In recent years, the local authority has restored the city to its original appearance (Photo: Xinhua)