<prompt> Qedela umusho olandelayo:  <response>: Ukungqubuzana kweSino-Soviet 1929. Ngaleso sikhathi iSoviet Union yayiphishekela uhlelo lwezwe lonke lokwenza izimboni ngobuningi ukuze ilungiselele impi eyayingase ibe khona emaceleni amabili neJalimane neJapane ngokulandelana. Ukusungulwa kweManchukuo kwayinkimbinkimbi isimo njengoba insimu yayo manje yayinezakhamuzi zaseSoviet ezingama-40,000 ezazisebenza eChina Eastern Railway. Nakuba amaSoviet enqaba ukuqaphela ngokusemthethweni umbuso omusha, athengisa ujantshi kumaJapane ngo-March 1935, ngentengo encishisiwe kulandela uchungechunge lwezinxushunxushu zamaJapane. AmaSoviet azizwa engakulungele ukulwa okusha neJapane, akhetha ukuthuthukisa ubudlelwano neChina njengendlela yokulwa yesikhashana. INhlangano Yezizwe yahlala ithule endabeni yobukhosi baseJapane, yaphoqa iChina ukuba ivuselele izindlela zayo zokuxhumana ezingekho emthethweni nomlingani wayo okuwukuphela kwakhe owayekhona. Isivumelwano Sokulwa NeComintern, esasayinwa ngoNovemba 25, 1936, sasusa ukungabaza okwakukhona ezinhlangothini zombili mayelana nemizamo yokubuyisana eyayisaqhubeka. NgoJulayi 7, 1937, iMarco Polo Bridge Incident yaphawula ukuqala kweMpi Yesibili YamaShayina namaJapane. Ngo-August 21, iChina neSoviet Union basayina isivumelwano sokungahlaseli. Nakuba lesi sivumelwano sasingakhulumi ngosizo lwezempi lwaseSoviet, empeleni sasimemezela ukuthi amaSoviet ayezonikeza usizo lwezempi nolwezinto ezibonakalayo. 