The Legend of Qin Season 1 Episode 9 E 9

Master Xu tells Gai Nie that another legendary sword, Shui Han, is somewhere in the Mechanical City. The air is abuzz with news of a young newcomer challenging ?Iron Hammer?, a giant Mohist warrior, to a friendly duel. Tian Ming is delighted to discover that the challenger is none other than Shao Yu, whose skills overwhelm the giant. However, when Tian Ming challenges Shao Yu, the giant intervenes and chides Tian Ming. Unbeknownst to our heroes, Wei Zhuang sends two spies into the Mechanical City to prepare for the attack.