Yang was an unused substitute as South Korea reached the Asian Games final.
The Celtic winger missed out on the quarter final win over Vietnam and later revealed he sat that one out due to a hamstring injury, but hoped to return to play his part.
Today, they faced China in the semi-finals as they looked to reach the last two. Yng was named in the matchday squad for this one but on the bench, and stayed there throughout.
Yudong Wang put China 1-0 up but ten minutes later Young-Jun Lee equalised for the Koreans.
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The comeback was complete on 82 minutes when Bae Junho scored a late winner.
Yang and his teammates will find out later on who they will face in the final, with Uzbekistan and Japan playing in the other semi-final.
The Celtic star is one of the over age players starring for his nation's under-23s side at the Games, causing him to miss some big games for his club, incuding the derby double header against Rangers.
He will hope to play a part in the final before returning to Scotland.
