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The last month of 2023, December The only remaining railway opening in December is the extension of Line 1. Line 1 will now have over 100 stations. Let's take a look at the process it went through to reach this number. #Line1 #Extension #Yeoncheon 00:00 Intro 00:25 Subway Line 1 gradually extended 04:38 Extended all the way to Dongducheon, Chungcheongnam-do 08:38 Finally surpassing 100?