WUCHANG, July 5, 2016 (Xinhua) -- A duck shed is seen in a rice field in Tiandaoweng Organic Rice Production Base in Wuchang City, northeast China's Heilongjiang Province, July 5, 2016. Thousands of ducks and crabs have been put in about 200 hectares of rice fields in the production base recently. It's an eco-friendly farming system to produce organic rice, avoiding using toxic pesticides. (Xinhua/Wang Jianwei)
