Dayu measured the nine states with his footprints and built nine tripods to control them. He used an iron rod to measure the East China Sea, but the iron rod was unstable, so he ordered craftsmen to build an exquisite tripod and place it under the iron rod.
During the Spring and Autumn Period, there was an ape who had attained enlightenment and had extraordinary abilities. He came to the East China Sea to borrow treasures and took away the iron rod, leaving only the exquisite tripod to control the water of the East China Sea.
