When the Heilongjiang River froze that winter, they built a temporary bridge over the ice to connect the line to the Soviet Railways at Blagoveshchensk on the other side of the border.

The Soviet Army used this temporary connection to ship equipment stolen from Manchuria, and prior to the withdrawal in April 1946, the Beihei Line was ransacked, with anything moveable - locomotives, rolling stock, bridge components, tracks, etc.

In the spring of 1949, basic repairs were undertaken on the line, but due to the difficulty of running trains, the tracks were removed in the autumn of that year.

The 71.3 km (44.3 mi) line from Bei'an to Jusheng was opened in November 1965, and officially put into operation in January 1966.

However, the 7.8 km (4.8 mi) stretch from Longzhen to Jusheng was soon dismantled again, and due to worsening relations between China and the USSR, the planned reconstruction of the Longzhen–Heihe section was suspended for many years, until it was finally begun on 15 July 1986.