The Kung Fu Kids IV
跨越時空的小子 (original)
A young martial arts kid travels by accident from another dimension to our world in search of a magical swordsman.
Starring Yen Cheng-kuo, Tso Shiao-Hu, Chung Jung Chen, David Wu
Watch "The Kung Fu Kids IV" on Amazon released in 1987. It's a action & adventure movie, and has a rating of 7 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.