While he won numerous competitions both nationally and internationally, Chong decided to try his hand at train in other forms of martial arts, including Hapkido, Judo, Aikido, and Boxing.
Chong's picture was shown as Kim Sun-Yung of Tang Soo Do or Dohk Sa in the 1984 American film The Karate Kid in the Cobra Kai Dojo.
The film would include some of Chong's students as cast members as well as martial arts legend Bill Wallace and a pre-fame Thomas F. Wilson of the Back to the Future trilogy.
His second film, Silent Assassins, had Chong team up with real-life student Sam J. Jones and Linda Blair.
In 2015, he made a cameo appearance as himself in the comeback film for Phillip Rhee, Underdog Kids as a judge alongside fellow martial arts legends Richard Norton, Don Wilson, Benny Urquidez, and Dan Inosanto.