Rubuta ci gaba don wannan sakin layi - A halin yanzu, arewacin mahaifar Manchu, masu ba da labari Vassili Poyarkov (1643<unk>1646) da Yerofei Khabarov (1649<unk>1653) sun fara binciken kwarin Kogin Amur don Tsarist Rasha. A cikin 1653 an sake kiran Khabarov zuwa Moscow kuma an maye gurbinsa da Onufriy Stepanov, wanda ya ɗauki umurnin sojojin Cossack na Khabarov. Stepanov ya tafi kudu zuwa Kogin Sungari, tare da wanda ya bukaci "yasak" (hadaya ta fata) daga mazaunan asali kamar Daur da Duchers, amma waɗannan ƙungiyoyin sun yi tsayayya saboda sun riga sun biya haraji ga Sarkin Shunzhi ("Shamshakan" a cikin kafofin Rasha). A cikin 1654 Stepanov ya ci nasara da ƙaramin rundunar Manchu da aka aika daga Ningguta don bincika ci gaban Rasha. A cikin 1655 wani kwamandan Qing, Mongol Minggadari (d. 1669), ya ci sojojin Stepanov a Fort Kumarsk a kan Amur, amma wannan bai isa ya bi Rasha ba. A shekara ta 1658, duk da haka, Janar na Manchu Šarhūda (1599<unk>1659) ya kai wa Stepanov hari tare da rundunar jiragen ruwa 40 ko fiye da jiragen ruwa waɗanda suka yi nasarar kashe ko kama yawancin Rasha. Wannan nasarar ta Qing ta share kwarin Amur na dan lokaci daga 'yan Cossack, amma rikice-rikicen kan iyaka tsakanin Sin da Rasha
zai ci gaba har zuwa 1689, lokacin da sanya hannu kan Yarjejeniyar Nerchinsk ya tabbatar da iyakokin tsakanin Rasha da Qing.