Aerial photo taken on July 25, 2019 shows terraced fields, where farmers breed fish, in Xiaozhoushan Township of Qingtian County, east China's Zhejiang Province. Since 2013, following the principle of green development, local authorities have been giving full play to over 4000 mu (about 267 hectares) terraced fields. By relying on agriculture with a history over 1000 years, Qingtian county promotes integration of agriculture, tourism and culture to develop sustainable agriculture and countryside tourism, and boost farmers' income. (Xinhua/Xu Yu)