Introduction to the main gate: The main gate of the memorial garden consists of a retaining wall, an archway, a screen wall and a small square outside the gate. The gate is 12 meters high and 15.6 meters wide. It is in the form of a three-hole arch, with a sloping roof, green walls, and glazed tiles and cornices, giving it an antique look. The "Cai Lun Memorial Garden" on the front door of the main entrance and the inner gate are respectively inscribed by Zhou Guangzhao, former vice chairman of the National People's Congress and chairman of the China Association for Science and Technology, and Hu Sheng, a famous scholar and former vice chairman of the National Committee of the Chinese People's Political Consultative Conference. Two couplets are written on the arch pillars.