Aerial photo taken on Aug. 22, 2018 shows a section of Changqu Canal in Xiangyang, central China's Hubei Province. The Changqu Canal has been added to the World Heritage Irrigation Structures list by the International Commission on Irrigation and Drainage (ICID) recently. (Xinhua/Xiong Qi)

Aerial photo taken on Aug. 22, 2018 shows a section of Changqu Canal in Xiangyang, central China's Hubei Province. The Changqu Canal has been added to the World Heritage Irrigation Structures list by the International Commission on Irrigation and Drainage (ICID) recently. (Xinhua/Xiong Qi)

Aerial photo taken on Aug. 22, 2018 shows a section of Changqu Canal in Xiangyang, central China's Hubei Province. The Changqu Canal has been added to the World Heritage Irrigation Structures list by the International Commission on Irrigation and Drainage (ICID) recently. (Xinhua/Xiong Qi)

Aerial photo taken on Aug. 22, 2018 shows a section of Changqu Canal in Xiangyang, central China's Hubei Province. The Changqu Canal has been added to the World Heritage Irrigation Structures list by the International Commission on Irrigation and Drainage (ICID) recently. (Xinhua/Xiong Qi)

Aerial photo taken on Aug. 22, 2018 shows a section of Changqu Canal in Xiangyang, central China's Hubei Province. The Changqu Canal has been added to the World Heritage Irrigation Structures list by the International Commission on Irrigation and Drainage (ICID) recently. (Xinhua/Xiong Qi)