Paper Marriage (1988)

Set in Canada, a down-on-his-luck Chinese boxer Bo Chin (Samo Hung) accepts promise of payment to marry a Hong Kong woman Jade Lee (Maggie Cheung) so she can get Canadian citizenship. They realize too late that they have been set up in a complicated plan to cheat them out of the woman's money. Their adventures begin when Bo is forced back into the ring and Jade tries her hand at mud-wrestling!