Introduction to the mountain gate: The mountain gate is simple and dignified. There are six characters on the forehead of the door: "The place where King Wen of Zhou performed the Yiyi". It was built around the Ming Dynasty. There is a stele on the left side of the stone steps, which reads "King Wen of Zhou Youli City" in six regular script characters. It was inscribed and erected by Shang Ji, the magistrate of Tangyin County in the 10th year of Chenghua in the Ming Dynasty (1474 AD). The "Yu Stele" on the right side of the stone steps is a monument praising the merits of Yu the Great for controlling floods. The handwriting on this stele is unique and shaped like a tadpole, so it is also called tadpole writing.