The Kung Fu Instructor

In the town of Ho Si, two prominent Chinese clans have a family feud dating back centuries. The ancestors of the malevolent Mong clan and the righteous Chows split up their territories with a property line and instituted laws to keep each faction from crossing those lines. Those brave enough to traverse the line have their legs cut off by the opposing clan. The Chows want to do away with this ridiculous law and establish relations with the Mongs. (wikipedia.org)