Introduction to the Memorial Hall of the Red Army's Conquest of Jianmen Pass: The Memorial Hall of the Red Army's Conquest of Jianmen Pass. The four walls of the memorial hall are the Seventy-Two Peaks of Jianmen and Qianren Cliff, and the underground is a sunken sand table. The whole is divided into two parts. The first part mainly displays some of the revolutionary struggles that took place in Jiange and the revolutionary cultural relics left behind by the Red Army.