南滿洲鐵道
In 1907, an agreement was reached between the Japanese and Russian authorities about connecting the Japanese South Manchuria Railway with the line to the north, which remained in the hands of Russian China Far East Railway. According to the agreement, Russian gauge tracks would continue from the "Russian" Kuanchengzi Station to the "Japanese" Changchun station, and vice versa, tracks on the "gauge adapted by the South Manchuria Railway" (i.e., the standard gauge) would continue from the Changchun Station to the Kuancheng Station.