Sichuan province bitter fleabane installs a county similar Jia Lingjiang of village of channel of the room that press down oil paragraphAfter Jia Lingjiang been sheddinging Sichuan to save bitter fleabane to install a county, as a result of Jiang Shui erode, the deposit of silt, form the islands in 2 tremendous rivers: Sun island and lunar island. From dusk spring to Chuqiu season, early morning, hundreds farm cattle parts to swim from gang of Jia Lingjiang bank the island goes, gnaw eat green grass; Crepuscular, the ox enters the water again migration toes disembark. Marvellous spectacle of this kind of zoology is called " 100 Niu Du rivers " . 100 Niu Du rivers are the by-product that equestrian backwater power station builds. Before 1994, village of channel of oily room of fine hill river paragraph water level is not high, ox can go to the island to browse directly. After 1994, store water of the brake below station of equestrian wire back sends Jia Lingjiang water level to lift, annual dusk spring arrives Chuqiu season, ox be unable to bear or endure thither " cate " alluring, still had waded the island on Jiang Shui browses, As time passes, formed every day sunrise crosses the island on the river, sunset ford puts in the habit of column 's charge. From this, "100 Niu Du rivers " picture is formed gradually. Sexes of 100 zoology of Niu Du Jiang Yuan are strong, time span is long, can last to October from May.