Among them is the Pyongyang Building Stone Factory.

It turns out several tens more tons of stone products every day for the projects to spruce up Samjiyon County and create the Wonsan-Kalma coastal tourist area.

Recently, the factory finished dressing white marbles amounting to hundreds tons to be sent to Samjiyon County.

It also overfulfilled the production plan of artificial flagstones and stair-step stones for the construction of the Wonsan-Kalma coastal tourist area by 1.6 times.

It has waged a mass technological innovation movement to equip itself with modern equipment, thus increasing its production capacity 2.5 times.

Meanwhile, Phyongsong Mine of the factory raised the capacity of winch for carrying rough stone and upgraded the roll crusher and other production processes to lift the production rate.