on the web page, I found '저작자표시 : Yes, 상업적이용 : Yes, 컨텐츠변경: Yes'. It means he allows commerical use and derived works with the condition of attribution.
Conditions d’utilisation
Objet
The depicted structure situated in or visible from public space (e.g. a building, a bridge, a signage) in South Korea is ineligible for copyright as it is a simple or ordinary work with no architectural or artistic properties that would have made it a copyrighted structure. It may also be a work of an engineer (like an infrastructure), not of an architect. In several countries like South Korea and the United States, bridges are not among their copyrightable works.
Notes:
Different jurisdictions have different levels of originality with regards to works of art or architecture: see Threshold of originality for more details.
In a few countries like France and Thailand, bridges may be among their copyrightable works.
A building or a bridge is eligible for copyright if it is a true architectural work; images of such buildings or bridges are not allowed on Wikimedia Commons unless there is an applicable freedom of panorama (that allows commercial uses) in the jurisdiction where the building or the bridge is located; see Commons:Freedom of panorama for more details.
Le détenteur des droits d'auteur sur cette œuvre autorise toute personne à l'utiliser pour tout usage y compris la redistribution sans restrictions, l'usage à titre commercial, et la modification.
Veuillez vérifier la source pour vous assurer que l'affirmation ci-dessus est correcte. En particulier, notez que la publication sur Internet, comme la publication par tout autre moyen, n'implique pas en soi la permission de redistribuer. Les fichiers sans permission valide devraient être annotés avec {{subst:npd}}.
Remarques :
si l’œuvre exige que sa paternité soit indiquée, utilisez plutôt {{Attribution}}.
s'il s'agit de votre propre œuvre, veuillez plutôt utiliser {{Cc-zero}}.