South Korea plan to bring 35,000 tons of Russian coal through North Korea’s Rajin port next month, in a test run for future trilateral logistics projects, according to Voice of America.

Three South Korean companies, KORAIL, POSCO and Hyundai Merchant Marine will work on the North Korean project, which South Korean authorities hope will link the country to the trans-Siberian railway via the DPRK’s northernmost port.

Rajin port is strategically significant as it doesn’t ice over in winter, meaning it can be easily reached all year round. A new wharf was added to the port in July, adding a