"Records of the Grand Historian: Biography of Wu Zixu" records that it was hung above the East Gate. "Commentary" Zheng Yi says: The East Gate is the Gu Gate, which is also the Pu Gate. It is now called Fengmen. Gu is pronounced "pu gu fan" (third tone, rising tone). It is also the name of a type of fish. "Gu Yewang's Explanation": The Gu fish is also called the River Porpoise, which surges when it encounters wind.