Introduction to Acacia Road: A tunnel is dug southward in the middle of the south corridor, leading to the tomb of King Xiao of Liang. The total length is 52.5 meters, the width is 2.30-2.35 meters, and the height is 2.2 meters. It slopes from north to south. It is said that this tunnel was the "Huangquan Road" where Queen Li and King Xiao of Liang met underground. Unfortunately, the tunnel was not opened, which became an eternal regret.