In April 2010, North Korea watchers inferred an unannounced visit to China by Kim, based on the supposed sighting of his train in the Chinese border city of Dandong; soon, however, it was learned that the train in question was just a regular cargo train, and Kim remained in North Korea.
V apríli 2010 svedkovia v Číne odvodili neohlásenú návštevu Kima v Číne na základe pozorovania jeho vlaku v čínskom pohraničnom meste Dandong, ale čoskoro sa dozvedeli, že predmetný vlak bol len pravidelný nákladný vlak a Kim zostal v Severnej Kórei.