Sounds like this fellow earned at least two Medals of Honor.
There are 3 separate actions of heroism that deserve recognition.
His first action in holding a hill (June 1950), by him self, while allowing others to escape.
His second action in staying behind (Nov 1950), trying to provide protection as others try to escape being overrun.
His third action in what he did as a POW, in helping other POWs. (recently deceased MoH recipient Admiral Stockdale received his MoH for actions while a POW.)
All three, at a surface level, would probably meet the conditions established for awarding the MoH. Seems to me that appropriate recognition could result in 1 or 2 MoHs, and slightly lessor awards of either a Silver Star or Distinguished Service Cross for actions deemed not quite up to the standards of a MoH. A truly inspiring story! Sometimes the "American by Choice" can put the "American by Birth" to shame ...they realize, much more, what a treasure this country is, and they often show greater gratitude.
Mike