Yanzi River River in Gansu, China From Wikipedia, the free encyclopedia The Yanzi River or Creek (Chinese: 燕子河, Yànzǐhé, literally "Swallow Creek") is a river in Gansu, China. It is a tributary of the Xihan, itself a part of the Yangtze watershed. This article related to a river in China is a stub. You can help Wikipedia by adding missing information.vte Related Articles