The upgraded capacity will enable the factory to produce dozens of kinds of building materials and distribute them to major construction sites including those in Pyongyang.

Present at an opening ceremony on Thursday were Premier Choe Yong Rim, member of the Presidium of the Political Bureau of the C.C., the Workers' Party of Korea, officials concerned and workers, technicians and officials of the factory.

A message of thanks sent by the Central Committee of the Workers' Party of Korea was conveyed to the workers, technicians and officials whose feats for the project are merited.

The message said the factory turned into a comprehensive building-materials factory, one of the best in the country, under the wise leadership of Kim Jong Il and the dear respected Kim Jong Un.

It highly praised the merited workers, technicians and officials of the factory for changing their factory into another edifice by displaying popular heroism and matchless devotion, keeping in mind pure faith in the party and leader and ardent patriotism.

Jang Su Gil, vice department director of the C.C., the WPK, made an opening address which was followed by speeches.

Then the participants looked round the factory.