The 27-year-old made six appearances for Arsenal last season, scoring once, after joining from AS Monaco last year.
Park played in the 2006 and 2010 World Cups and helped his country to a bronze medal at the London Olympics, where he scored two goals.
Celta have lost their opening two matches on their return to La Liga this season.
More news
Bizarre Jose Mourinho statement aims to pre-empt punishment after Fenerbahce boss clashes with Galatasaray counterpart
'Andy Robertson has a decision to make as a player, where you either roll your sleeves up and give someone great competition or you accept decisions and say that your time is done.' Alan Shearer on the conundrum facing Arne Slot's Liverpool
Most Popular
LATEST ARTICLES
