Introduction to the Yishan Archway: The Yishan Archway is located in front of the first mountain gate. It is a seven-story antique building with four pillars, three doors, and brackets on the seventh floor. It is colorfully painted, with a yellow glazed tile roof, shining golden light, and extraordinary momentum. The wooden plaque has the word "億山" engraved on it, which was inscribed by Sha Menghai, a famous contemporary calligrapher.