Introduction to Gongcheng Academy: Gongcheng Academy, formerly known as "Luomeng Academy", is located at the foot of Luomeng Mountain in Tongtong County. It was first built in 1105 during the Song Dynasty and was rebuilt during the Qianlong period after being destroyed. It is now the most complete ancient Dong academy in China. . When the Central Red Army passed through the passage on its long march in 1934, it was here that a temporary emergency "passage meeting" was held, forming the famous "passage transfer" in history, which saved the Red Army and the Chinese revolution.