9 3 7 ) ▁which ▁he ▁wrote ▁in ▁the ▁home ▁of ▁I da ▁P ru itt . ▁ ▁In ▁July ▁ 1 9 3 7 , ▁shortly ▁after ▁arriv ing ▁in ▁Tokyo ▁on ▁his ▁first ▁visit , ▁Japan ▁launched ▁the ▁second ▁phase ▁of ▁its ▁invasion ▁of ▁China . ▁ ▁Ber tr am ▁hurried ly ▁returned ▁to ▁Be ij ing ▁just ▁days ▁before ▁the ▁Japanese ▁captured ▁the ▁city . ▁ ▁T ogether ▁with ▁Ed gar ▁Snow , ▁they ▁ev acu ated ▁to ▁T ian jin ▁( T ient sin ) ▁with ▁Z hou ▁En la i ' s ▁wife ▁D eng ▁Y ing cha o ▁dis gu ised ▁as ▁Snow ' s ▁household ▁servant ▁before ▁finding ▁their ▁way ▁back ▁to ▁X i ' an . ▁ ▁Yan ' an ▁and ▁the ▁North ▁China ▁Front ▁In ▁X i ' an ▁Ber tr am ▁received ▁a ▁radio ▁message ▁from ▁Ma o ▁Z ed ong , ▁inv iting ▁him ▁to ▁become ▁the ▁first ▁official ▁' B rit ish ' ▁visitor ▁to ▁Yan ' an ▁( Y en an ). ▁Ber tr am ▁spent ▁nearly ▁a ▁month ▁in ▁Yan ' an ▁during ▁which ▁time ▁he ▁conducted ▁an ▁extensive ▁series ▁of ▁inter views ▁with ▁Ma o ▁in ▁his ▁cave - d well ing ▁during ▁which ▁Ma o ▁exp ounded ▁the ▁Japanese ▁object ives ▁and ▁the ▁strateg ies ▁he ▁believed ▁that ▁the ▁Chinese ▁should ▁adopt ▁to ▁defeat ▁the ▁Japanese . ▁ ▁" Inter view ▁with ▁the ▁British ▁Journal ist ▁James ▁Ber tr am " ▁was ▁c ited ▁in ▁Ma o