| K League 1 2021 Relegation - Appearances as Assistant | ||||
| 07/11/2021 | Pohang Steelers | - | Gwangju FC | 1:2 |
| 04/12/2021 | Gangwon FC | - | Seongnam FC | 2:1 |
| K League 1 2021 Relegation - Appearances as Assistant | ||||
| 07/11/2021 | Pohang Steelers | - | Gwangju FC | 1:2 |
| 04/12/2021 | Gangwon FC | - | Seongnam FC | 2:1 |
| Complete name: | Bong-geun Song |
| Born: | |
| Place of birth: |
South Korea |
| Nationality: |
South Korea |