The branch bureau has produced tens of thousands of concrete sleepers and raised the strength of rails in over 100 km-long section, thus increasing the stability of transport.

The Sariwon Sleeper Production Company carried out its sleeper production plan for this year at over 120 percent.

The technicians and workers of the fittings production base and the trackmen's team increased the production of parts of more than 10 kinds needed for sleeper-laying considerably as compared with that of last year.

The youth railway mechanized mobile companies of the Sariwon railway trackmen's team, the main force in changing sleepers, replaced tens of thousands of sleepers.

The youth railway mechanized mobile company under the Sohung railway trackmen's team, too, replaced the sleepers in railway section of tens of kilometers with steep gradients, installed fitting and did other repairs.