The Jungang Line reference article from the English Wikipedia on 24-Apr-2004
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Jungang Line

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The Jungang Line (Jungangseon in Korean (Hangul: 중앙선; Hanja: 中央線)) is a railway line connecting Seoul to Gyeongju in South Korea. Major stations along the line include:

From Gyeongju, some trains continue south on the Donghae Nambu Line to Busan.

Jungang means "central" in Korean, and describes the line's route through the mountains in the east-central part of South Korea.