Pictures taken during ceremonial events for the New Year in North Korea cast some light on changes at the top of the regime. One figure who has come to prominence is Jo Yon-jun (74), a first deputy of the Workers Party's Organization and Guidance Department.

Jo is seen standing close to leader Kim Jong-un paying homage at the Kumsusan Palace of the Sun, where the embalmed remains of former leaders Kim Il-sung and Kim Jong-il are displayed.

The younger Kim generally seems to prefer to surround himself with party officials rather than military brass.

Jo is believed to be responsible for supervising recent purges of top brass and other officials.

"Kim Jong-un visits the Kumsusan Palace around a dozen times a year, but the first visit each year draws the most attention, since it coincides with the political goals set for the year."