It seems you double-posted, twiceIs selections for the national team solely based on tryouts except for those who get a pass anyway? If, lets say, Ki Dong Ju and Shin Tae Yang would do better than Wang Chan and Na Seung Sung at the tryouts, would they overtake their spots despite Wang/Na doing pretty well this year?

When they publish the results, they typically mention one or two players who are selected at the coaches' discretion. I suspect sometimes that means they have something that makes them attractive for sparring at the national training centre but also there is the possibility that players in form will still get the nod. Also, I believe I've seen national team players who were injured during the trials still being selected.