Buuxi weedha soo socota: CER waxay ahayd mashruuc ay si wada jir ah u fuliyeen Shiinaha iyo Ruushka, kadib Dagaalkii Ruushka iyo Japan, Japan waxay la wareegeen qaybta koonfureed ee CER, iyagoo sameeyay South Manchuria Railway, iyadoo qaybaha waqooyi ay weli hoos yimaadaan gacanta Shiinaha iyo Ruushka. Ka dib kacaankii Oktoobar, tareenka waxaa xakameeyay Ruushka Cad muddo ah intii lagu jiray Dagaalkii Sokeeye ee Ruushka, laakiin laga bilaabo 1917 dowladda Jamhuuriyadda Shiinaha waxay bilowday inay si weyn u xakameyso tareenka, illaa 1922 CER si rasmi ah looga dhigay shirkad wadaag ah oo Sino-Soviet ah. Si kastaba ha noqotee, sanadkii 1929 Shiinuhu waxay la wareegeen gacan ku haynta CER, iyagoo weeraray qunsuliyadda Soviet ee Harbin waxayna xireen saraakiishii CER. Tani waxay keentay
Dagaalkii Sino-Soviet ee 1929, kaas oo ay Soofiyeetiyiintu si dhakhso leh ugu jabiyeen ciidankii Shiinaha waxayna ku qasbeen Shiinaha inay mar kale aqbalaan koontaroolka wadajirka ah ee tareenka. Ka dib dhacdadii Mukden, Ruushku wuxuu gacanta ku hayey tareenka inkasta oo ay Japan qabsatay waqooyi-bari Shiinaha; ka dib markii la aasaasay Manchukuo sanadkii 1932, CER waxay noqotay shirkad wadaag ah oo ay leeyihiin Ruushka iyo Manchukuo oo loo yaqaan "North Manchuria Railway". Bishii Maarso 1935, dowladda Manchukuo waxay iibsatay saamiga Soofiyeeti ee NMR 140 milyan oo yen, shabakaddii oo dhanna waxaa la wareegay Tareenka Qaranka ee Manchukuo.