The at this time ugly Jackie Chan appears at the background (15th minute).<br>If you have the DVD Chung Fat appears at 1.07.00 behind Yuen Biao.<br>The Yuen Brothers only appear as background fighter.<br><br><br>

It's possible, that Jackie Chan worked also as stuntman on this movie. But I can't say on which occassion.<br><br><br>