It appears as if DUEL AT MAKOK is the same movie as KINGS OF BLADE AND SWORD:
https://hkmdb.com/db/movies/view.mhtml? ... ay_set=engThe poster shows the main actors in clothings they also wore in KINGS. The bloody head appears to have been copied from this scene:

There's a Korean synopsis in the KMDB entry:
https://www.kmdb.or.kr/db/kor/detail/mo ... 906/creditGoogle translator confirms that it's the same plot like in KINGS.
Currently listed actor 姜鳴 Gang Myeong alias Chiang Ming (has only this one credit) is probably the better known Chiang Ming who is already listed. His Korean name is 강명 which can be romanized as Kang Myung or Gang Myeong (before someone gets the idea to add 姜鳴 as an alias: KMDB has two 강명's, one with chinese Alias 江明 (no profile page), the other with Alias 姜鳴 (with profile page). The latter is obviously a different person with movies from 1953-1963).
KINGS OF BLADE AND SWORD:
https://hkmdb.com/db/movies/view.mhtml? ... ay_set=engIt was partly filmed in the same locations as GOLDEN-HEADED EAGLE, so the filming location "Taiwan" is probably wrong. The current Korean poster (龍門의女劍) belongs to EAGLE which I have already addressed in a separate topic.
The Release Date 05/19/1970 of KINGS OF BLADE AND SWORD in HKMDB refers to HK, but in the HK newspaper archive I can't find a cinema ad for that date. IMDB says this was the Taiwanese release date which would make sense.