Heo made his professional debut for K League 1 side Gwangju FC on 30 May 2021 against Pohang Steelers.

[2] Heo Yool drew attention for his ability to control the right to provide and dribble as a tall striker.

[3] Although he performed better than expected, he did not meet the demands of Gwangju FC, where the build-up from the back is the key.

Now, he has transformed into a utility player who can play both strikers and defenders according to the situation.

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