They visited the Kumsusan Palace of the Sun where President Kim Il Sung and leader Kim Jong Il lie in state, with the news of the great success in the H-bomb test.

A ceremony of awarding party and state commendations to nuclear scientists, technicians, soldier-builders, workers and officials who contributed to the first successful H-bomb test took place with splendor in the presence of Marshal Kim Jong Un.

They visited the Phyongchon Revolutionary Site and the Sci-Tech Complex.

They toured the Mangyongdae Schoolchildren's Palace and enjoyed themselves at the Munsu Water Park and the Combined Service Boat Mujigae.

They expressed deep thanks to Kim Jong Un for arranging a banquet and birthday spreads and giving gifts to them.

They came back on Jan. 13.