Train travel time

It takes about 17 and a half hours from Chongjin to Pyongyang. It took 10 hours to Kowon and left about 30 minutes, so I had to keep rocking for seven more hours.
(Kim Won-jo, “Republic of the frozen land”)
The train leaving Wonsan takes six or seven hours to Pyongyang. It’s up to two hundred kilometers. There are a few hours waiting in seven hours. All private trains stop when army transport vehicles arrive. It takes four hours to go to Myohyangsan.
(Zhang Myong-sue “Betrayed paradise”)