Festive arrival on a railway station, most probably people going to an international conference or event. Among them apparently Russians. This must be a concrete moment/event, but we have not been able to establish which.
The text on the banner: Long live world peace - 世界和平万岁 - Shijie heping wan sui.
Bottom left is the title in Korean.
This is a print from the eighth impression (November 1956).