File photo: CGTN

Kim Jong-un, top leader of the Democratic People's Republic of Korea (DPRK), sent a letter expressing thanks to workers who contributed to the construction of Samjiyon City, the country's official newspaper Rodong Sinmun reported on Sunday.

Samjiyon, where Kim's father Kim Jong Il was born, is situated near Mount Paektu and the construction was completed in December.

Kim Jong-un has visited the construction site several times and given on-the-spot instructions over the past two years.