Introduction to Tiantian Gate: Built in the 42nd year of the Jiajing reign of the Ming Dynasty, 154 years earlier than the Tiantian Gate in Mount Tai, it is the choke point for climbing to the Purple Gold Summit. There is a stele tower on its southwest side, which contains a stone stele "Record of the Creation and Construction of the Temple Gate of Zijin Altar" engraved in the second year of Longqing in the Ming Dynasty. The stele is inscribed with a turtle's head and a round head, and the head and body are integrated.