The wind in Muyu Town is mixed with the bitterness of herbs, swinging slowly on the stone road. Song Shiyan squatted under the old locust tree at the entrance of the town, carefully avoiding the edge of the wound with his fingertips, and applied the crushed golden sore medicine on the leg of poor Hank. Hank was a driver. Yesterday, he had to avoid an out-of-control carriage and fell on the gravel road, causing a deep cut in his calf. He had no money to hire a serious doctor, so he found Song Shiyan, who often treated people's injuries for free.