Juezhang tu
Onearthed on Qingquan hill.The name Juezhang means drawing a strong crossbow with one's feet.《the Book of Former Han：biography of Shentujia》：Shentujia was a close attendant of Liubang and helped him to beat Xiangyu with his good talent of drawing a Strong crossbow.
Here is the rubbings of Juezhang tu with some introduction