 As Pyongyang grew and annexed many former parts of Taedong County, the area was later split up Pyongyang's Dong-guyok, Kangnam-gun, and Chunghwa-gun.Rangrang-guyok was officially created as a separate district in 1959.The district is famous for the large number of Han and Koguryo tombs which litter the area, many of which were first discovered by the Japanese in the early 1910s (see Nakrang Tombs).