Many years ago, the Yellow River flood. Emperor Shun askYu to cure the flood. The emperor in heaven also ordered his little daughter came down called Tushan and she married Yu, they worked together to cure the flood. Yu cut off Qi mountain and Luliang mountain the flood downstream Flow to the Longmen Mountain be clogged up, the Longmen cliffs was difficult to work, Yu request Yin-dragon split the mountain, so the water flows straight down, just like a gate, thus the creature inside the water does not come up, the place in today’s in Herjin district Shanxi province.
     
    Every spring, when the golden carp will be traced back water on the gate flocks jump, but falls over, because fast-flowing, no fish can leap, carp were also unable to return home, so the carp protest to Yu couple .

    Tushan smiled: "I report to the Emperor, to whom leap up will immediately change into a dragon, drive the cloud to heaven, but those hurt can only blame themselves, and do not make trouble ... . "from that time, every late spring season, there are numerous golden carp follow the Yellow River upstream, gathered down the gate, struggling to jump, occasional, it turns into a dragon, soaring over the sky. The place turn into dragon called "Dragon gate".

    "Big Splash-鯉魚躍龍門" meaning somebody turn into very valuable person.