When attacking Zhongshan State, a soldier got a poisonous sore, and Wu Qi knelt down to suck pus for him himself. When the soldier's mother heard about it, she burst into tears. Someone was surprised and went up to her and asked, "Aunt, what are you crying about when the general treated your son like this?"
The mother raised her tears and replied: "Wu Qi sucked his father's wound and his father died; Now my son has a poisonous sore, and he sucks it off himself. My son is going to die in the battlefield, and I am crying for it now. "
Wu Qi is very calculating. Sucking pus for soldiers is to gain the morale of the army and let soldiers die for him, so that his army can be invincible.