Kammala jumlar da ke gaba: Jamhuriyar China da Masarautar Iran sun kulla huldar diflomasiyya a 1937. A shekara ta 1971, Iran ta amince da Jamhuriyar Jama'ar Sin (wanda Jam'iyyar Kwaminis ta kasar Sin ke mulki) a matsayin gwamnatin da ta dace ta kasar Sin, kuma ta kuma soke amincewar da ta yi wa Jamhuriyar Sin (tare da gwamnatin Kuomintang da ke Taiwan a yanzu) a matsayin kasa. A farkon shekarun Yakin Cacar Baki, Iran da Jamhuriyar Jama'ar Sin sun kasance a bangarori daban-daban na Iron Curtain, tare da Iran ta kasance wani ɓangare na Ƙungiyar Yammacin Amirka daga
1953 juyin mulki da kuma China kasancewar wani ɓangare na Soviet-jagoranci Eastern Bloc har sai da na karshe ya rabu a 1961, ta haka ne tare da Yammacin Yamma har zuwa karshen Cold War.