When Suk-young Park arrives in Pyongyang on an airliner, it appears to be an Ilyushin IL-62 with four tail mounted engines, two on each side. After he exits the plane there is an under wing engine in sight. No airliner of this configuration exists.
When Suk-young Park arrives in Pyongyang for the first time and is driven around the city, he goes past the Mansudae Grand Monument which is large statues of Kim Il-sung and Kim Jong-il. At the time this scene is set it only the statue of Kim Il-sung was there. The statue of Kim Jong-il was erected after his death.