It is interesting that they (North Korea) used “an armored train” (a very, very old Russian Revolutionary tactical favorite “toy” of Stalin, Lenin and that era) to pass unstopped THROUGH China with no recognition and no ceremonies with the Red Chinese government en-route.
Kind of like the Canadian Prime Minister being locked in a train from Montreal to the Rio Grande as they passes through the US headed for Mexico. Or, echoing Lenin again, Lenin being locked in a train as he was smuggled through Germany to begin the Russian Revolution during WWI. Which also helped Germany because it was Lenin’s war that stopped Russian involvement in WWI and freed up German Army from the Eastern Front.
Thanks Robert A Cook PE.