Ka cika wannan jumla: Ƙarshen shekarun 1960 ya kawo wani lokaci na canji. Ga kasar Sin, lokacin da shugaban Amurka Johnson ya yanke shawarar kawo karshen yakin Vietnam a shekarar 1968, ya ba kasar Sin ra'ayi cewa Amurka ba ta da sha'awar fadadawa a Asiya, yayin da Tarayyar Soviet ta zama babbar barazana a matsayin
ta shiga tsakani a Czechoslovakia don kawar da gwamnatin kwaminisanci kuma tana iya shiga tsakani a China.