Cat Vs. Rat is a 1982 Shaw Brothers martial arts-comedy film directed by Lau Kar Leung, starring Alexander Fu, Adam Cheng, Kara Hui, and Hsiao Ho.

The plot is loosely based on the 19th century wuxia classic novel The Seven Heroes and Five Gallants.

Baak Juktong and Zin Ciu were martial arts students of the same sifu, Si Daatfu.

They quarreled and fought incessantly over who had the most powerful kungfu.

Later, Zin also saved the emperor, who appointed him imperial sword-bearing guard with the title "Royal Cat".