Introduction to agarwood stone: It is located under the Shengxian Pavilion in Suxianling, one meter square. It is said that on May 15th in the third year of Emperor Wen of the Western Han Dynasty (177 BC), Su Dan, a native of Chen, "crossed the crane and became an immortal with the immortal official" here. When he crossed the crane, he left five toe prints on the stone. On the flat stone on the upper right side, there is a Go board where Su Xian and Wang Xian played against each other. There is a finger hole in it. Legend has it that the losing side was dissatisfied and dug his finger into the stone.