Two freight trains consisting of 65 wagons containing Kuzbass coal are taking part in the trials, which are intended to test the recently redeveloped railway infrastructure, as well as customs practices and freight handling at the port.

The project is being carried out by the RasonKonTrans joint venture, which was formed in 2008, and is held by RZD Trading House (70%) and the port of Rason (30%). Work involved the reconstruction of the Tumangang – Rason railway in North Korea, which included the introduction of 54km of dual-gauge (1520mm and 1435mm) track, as well as the reconstruction of 18 bridges, 12 culverts, and three tunnels with a total length of more than 4.5km.

The railway was officially opened on September 22 2013, and was funded through RasonKonTrans' authorised capital and loans. The joint venture has also invested to improve capacity at the port, including the addition of connecting tracks, dredging and construction of a new quay wall.

RZD says the project will attract additional traffic to the Trans-Siberian Railway, with around 4 million tonnes of freight expected to use the Khasan - Rason link per year.