What is the relationship between Lin Xiaojun and Runqi Guo?

Both of them are members of South Korea's short track speed skating team and participated in the 2022 PyeongChang Winter Olympics.

South Korea sent Lin Xiaojun, Runqi Guo and others to the PyeongChang Winter Olympics. At first, they followed China closely. With more than 20 laps left, Lin Xiaojun lost his balance and suddenly fell down. South Korea lost the chance to compete for medals and finally reached the finish line.