belongs to the
ignita-group, perhaps
C. valida Mocsary, 1912, from the dark/black colouring on the head and mesosoma and the general
brevitarsis/pseudobrevitarsis -habitus. You can compare it yourself with the type in Rosa, Vas, & Xu 2017 "The Palaearctic types of Chrysididae (Insecta, Hymenoptera) deposited in the Hungarian Natural History Museum, Budapest".
However Korea is far away from central Europe, so it could be a similar species as well - hopefully Paolo knows more