What is the extent of the 4,000-ri Samhan region? : Locations of the 78 states of Samhan, Nakrang, Dongbuyeo, Haeseong and Yeomsa

In Korean history books, the Korean territory changes from Gojoseon to Northern Buyeo, Jolbon Buyeo, Goguryeo, Eastern Buyeo, Nakrang, Baekje, Silla, Gaya, and Wa. The sources of Korean history books are SamgukSagi,, SamgukYusa, and JewangUngi. In Chinese history books, Korea's territory changes from the border area ‘JinbeonJoseon’, ‘Jin-Beon-sideStates (眞･番･旁 衆國, zhēn ･fān ･páng zhōng guó)’ /‘Han Four Commanderies’ to the border area ‘Buyeo (2,000 li)’, Euplu, Goguryeo (2,000 li), Okjeo (500 li), Dongye, Samhan (4,000 li, Yeomsa), Wae/ ‘Daebang Commanderies’. The sources of Chinese historical books are from the Records of the Grand Historian, the Book of Han, the Chronicles of Joseon, to the Book of the Later Han, the Records of the Three Kingdoms, the Eastern Yi Chronicles. Let’s overlap the contents of two overdetermined historical records. The corresponding reference points are Goguryeo and the Three Kingdoms (Baekje, Silla, and Gaya). Between Goguryeo and Samhan, there are Dongbuyeo and Nakrang (Ancient History of Joseon). The location of the Samhan's Yeomsa was south of Salsu in the territory of Nakrang during the reign of Kingr Gwangmu in 44 AD (SamgukSagi). King Gwangmu’s appointment of Somasi as the county official of Yeomsa(廉斯邑君) in 44 AD and his seizure of Nakrang in 44 AD are two separate accounts of the same event (Book of the Later Han, Dongyi jeon, Samhan section). Salsu was south of Haeseong (HwandanGogi, Version 1 and Vression 2). The country of Nakrang consisted of Wanggeomseong, Haeseong, and Yeomsa. The 78 states are located south of the Han River (DonggukJiriji 1615, Han Baek-gyeom) or south of the Imjin River(consistent with the opinions of Shin Chae-ho, Lee Byeong-do, and Cheon Gwan-u). The 25 states of Nakrang are located south of the Yalu River, and the 70 or so states of Samhan are located south of the Imjin River (Ancient History of Joseon). Dongbuyeo borders Goguryeo to the north. Yeomsa borders the Liaoxi Han Commandery, Daebang Commandery (Giriyeong Military Base), to the south. The 78 states of Samhan border Wa to the south. The 20 Jinhan states are a combination of the eight Jinhan states of Yeomsa and the twelve Jinhan states of Han mainland Korea (Jewangungi). The location of the Three Han states includes the eastern Buyeo region within the Han 4,000-ri area (Himjeong Manchu YuanliuGao). Ultimately, the territory of the three Han states encompasses the territories of Dongbuyeo, Nakrang (Wanggeomseong, Haeseong, Yeomsa), and the 78 states of Samhan