DS4NMJ Lee, Sanghoon is still active as DT8A from King Sejong a year-round station , one of the two Korean Bases in Antarctica where he will operate until December 31st , 2021.
His manager DS5TOS (adress below) is fast QSLing and the cards of DT8A are always wonderful.
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DS5TOS 
Cho Jang-Hui,
Hyundai Town 110-1005
8 Daehak-ro 9-gil Gyeongsan-si
Gyeongsangbuk-do 38654, South Korea
Lee (DS4NMJ/DT8A) has a very nice Home page (hosted at: 극지연구소(영문) (kopri.re.kr) ) where readers can see pictures and information of King Sejong Base (WAP-KOR-Ø1), Jang Bogo (WAP KOR-Ø2), plus the Korean Icebreker Araon and the Arctic Dasan Station at Ny-Alesund, on Spitsbergen Island in the Svalbard Archipelago.
TNX DT8A & DS5TOS