Hua Tuo
During the Battle of Fancheng, Guan Yu is injured in the arm by a crossbow bolt coated with poison. The physician Hua Tuo comes to his camp and offers to heal his arm. After diagnosis, Hua Tuo says the poison has already seeped through the flesh into the bone and he needs to perform surgery on Guan Yu's arm. He also tells Guan Yu that he must be blindfolded and his arm must be secured before the surgery can be carried out, but Guan Yu says it is too troublesome and asks him to perform the surgery on the spot. Hua Tuo cuts open the flesh on Guan Yu's arm, exposing the bone, then scrapes off the venom on the bone and stitches up the wound. Guan Yu shows no sign of pain and continues playing weiqi with Ma Liang during the surgery. He thanks Hua Tuo for healing his arm and wants to reward him but the physician declines.