It's more than a dozen kilometers long, but only over 200 meters have been repaired for visitors. The tunnel is very short and needs to bend down from time to time. It's also very cold. We went in midsummer. We can't rush up because of the cold.
The Tunnel for the Transport of Tibetan Soldiers The Tunnel of Guangu in the Border of Song and Liao Dynasties was stationed by Yang Yanzhao, the hero. For sixteen years, Zheng Shouxiong prefecture has won many battles and won many battles. Tibetan soldiers are transported through tunnels while supervisors transmit information about enemies. Liaobang Kexing Yang Liulang, Megatron frontier guard.