Kim Jong Il always remembers the soldier-builders who were at repair work inside Mujigae (rainbow) Tunnel whom he acquainted himself while passing through it during his long journey for Songun leadership during the Arduous March.

At that time they were having their meals in darkness. So he told his chauffeur to stop the car despite the pressure of his time and turn its headlights on to lighten the dark tunnel for 15 minutes. These were a historic time when he openheartedly learned about the soldiers. This represented the world of the closest relationship between the Supreme Commander and his soldiers pervaded with sincerity.

His warm loving care for the soldiers immensely touched the army and people of the country and the then soldier-builders, in particular.

The soldier-builders did not know details of the great loving care shown to them by the Supreme Commander at that time. This has since been conveyed as an immortal legend. They are now studying at universities and party schools to prepare themselves as servants for the people, single-mindedly determined to live and struggle in the revolutionary soldier spirit and always remain loyal to the Supreme Commander.