Literature Reference: 路傍埋骨蒿草合，壁上题诗尘藓生。—— 《往年稠桑曾丧白马题诗厅壁今来尚存又复感怀更题绝句》 By the roadside, bones are buried under overgrown grass; on the wall, poems are inscribed, now covered with dust and moss. Source from 'In Memory of the White Horse Lost at Chou Sang, Revisited and Composed Again'.