72 Tenants of Prosperity

In 1970s Hong Kong, rapacious landlords try to evict 72 tenants but sworn brothers Ha Kung and Shek Kin help the group of 72 defeat the landlord and landlady and coincidentally rescue Pinky from a planned forced marriage.
Kung and Kin's rivalry goes way back to the seventies when they fought over the same girl, who eventually became Kung's wife. Now they run competing phone stores right across from each other on Mongkok's busiest street, and stretch their minds trying to outdo each other with crazy promotions.