Busan to gain tram line
https://www.metro-report.com/news/news-by-region/asia-pacific-ex-china/single-view/view/busan-to-gain-tram-line.html
Though population in Busan is decreasing gradually, railway opening in the city is still proceeding.
South Korean government is promoting railway construction all over the nation. Though I don't know real intention, I'm looking forward to see how South Korean transportation changes after that.