The Ou River (simplified Chinese: 瓯江; traditional Chinese: 甌江; pinyin: Ōujiāng; literally: "Bowl River") or Oujiang is the second-largest river in the Zhejiang province of eastern China. The river flows 388 kilometers (241 mi) before finally reaching the city of Wenzhou and emptying into the East China Sea, into which it discharges 20.2 billion cubic meters (710×10^9 cu ft) of water annually. Shen Jiang (慎江; "Cautious River"), Jiang Yongjia (永嘉江), and Wenjiang (温江; "Warm River") are all former names for the this river. Ouju, a form of Chinese opera from the city of Wenzhou, derives its name from the Ou River.
^Chen, Feng; Xian-fu Zhao; Jin-yong Zhao; Min Li (2012). "Investigation of fish resources in the Oujiang River and its protection strategy". Resources and Environment in the Yangtze Basin (in Chinese and with an English abstract) 21: 934–939.CS1 maint: Unrecognized language (link)