Busan Metro is the starting point of my travelling history around the world
Though the article is written in Japanse, those days' diary still exists.
It was May 1, 2010.
Then, there weren't platform screen doors in the stations on Busan Metro Line 1.
But, on the extended section, platform screen doors are installed completely.
Busan Metro Line 1 extended from Sinpyeong to Dadaepo Beach