Actually men in Korea can postpone their enlistment till they are 30 years old, that is what most of the celebrities do. Plus he would probably retire way earlier than that cause you know that is already an old age for a figure skater. Besides if a man wins a medal in a sports competition, he might be exempt from mandatory military enlistment according to the Korean law system. I don’t know the exact requirements for that tho but i’m sure he won’t be serving anytime soon.
So no worries cause he will probably keep skating for a long time~ He probably cried out of frustration cause you know, he is the type who hates losing and who wouldn’t cry anyway? I mean you lose a chance to win a medal and a medal is what a sportsman wants the most.