An aerial photo taken on May 1 shows mulberry fish ponds in Digang village, Huzhou's Nanxun district. Mulberry fish ponds are a special dike-pond model that integrates fish ponds with the breeding of mulberry silkworms. The model was listed among Globally Important Agricultural Heritage Systems by the Food and Agriculture Organization of the United Nations in 2017. [Photo/hz66.com]

An aerial photo shows mulberry fish ponds in Digang village, Huzhou's Nanxun district on May 1.[Photo/hz66.com]