Wu Song continued on his way when he came to the Tianhan Bridge. It was arched, so people had to use steps to ascend to the top. When he stepped onto the bridge, Wu Song lifted up his clothing and looked down at his feet so he could avoid the huge puddles of water left from the freak rain shower. Unbeknownst to him, he was walking directly towards an elderly man who was descending the stairs right above him. Wu Song continued to walk up the bridge without looking in front of him. This old man was Zhou Tong and he was in a hurry. When Zhou Tong saw Wu Song approaching him on the bridge without watching in front of him, he took Wu Song to be another martial arts master who wished to tarnish his reputation by throwing him off the bridge with a shoulder strike. Zhou Tong prepared for a counterattack and began to swallow air with a subtle "Hm!" and directed his energy to his right shoulder, which turned red then purple and became as hard as rock underneath his clothing. When the two men brushed shoulders, despite being a master of Iron Shirt and Drunken Eight Immortals boxing, Wu Song was nearly knocked off the bridge and the pain caused saliva to pour from his mouth. The attack left him weak in the knees and one side of his body was completely numb. He thought after all of his years of martial arts practice his body was nearly invincible, but he had met his superior in Zhou Tong. Instead of cursing and reprimanding the old man, Wu Song held his tongue, which greatly impressed Zhou Tong. In lieu of a kind word, Zhou Tong simply bowed in apology and went on his way since he was in a rush.