▁late ▁June , ▁a ▁force ▁under ▁Ji ▁Hong ch ang ▁pushed ▁n ortheast ▁against ▁Dol onn ur ▁with ▁two ▁corps . ▁ ▁The ▁Northern ▁corps ▁re capt ured ▁Ba och ang ▁from ▁the ▁now - dem oral ized ▁Man ch u ku o ▁force ▁under ▁C ui ▁X ing w u . ▁ ▁The ▁Southern ▁corps ▁under ▁F ang ▁Z hen w u ▁advanced ▁on ▁Guy uan , ▁held ▁by ▁the ▁collaboration ist ▁General ▁Li u ▁Gu it ang . ▁Li u ▁was ▁persu aded ▁to ▁change ▁sides , ▁and ▁surrender ed ▁Guy uan ▁and ▁other ▁places ▁on ▁the ▁Bash ang ▁Pl ate au ▁without ▁battle . ▁ ▁On ▁July ▁ 8 , ▁before ▁dawn , ▁Ji ▁Hong ch ang ▁began ▁an ▁assault ▁on ▁Dol onn ur , ▁capt uring ▁the ▁two ▁outer ▁defense ▁lines ▁outside ▁the ▁city ▁before ▁being ▁driven ▁back ▁with ▁heavy ▁cas ual ties . ▁ ▁Later ▁some ▁of ▁Ji ' s ▁soldiers ▁were ▁sent ▁in ▁dis gu ise ▁into ▁the ▁city ▁as ▁cover t ▁oper atives ▁to ▁gather ▁intelligence ▁for ▁a ▁second ▁attack . ▁ ▁This ▁second ▁attack ▁re - capt ured ▁Dol onn ur ▁on ▁July ▁ 1 2 , ▁effectively ▁driving ▁the ▁Japanese - Man ch u ku o ▁arm ies ▁out ▁of ▁Ch ah ar ▁province . ▁In ▁late ▁July , ▁F eng ▁Y ux i ang ▁and ▁Ji ▁Hong ch ang ▁established ▁the ▁" Com mit te e ▁For ▁Rec over ing ▁the ▁Four ▁Provin ces ▁of ▁the ▁N ortheast " ▁at ▁Kal gan ,