▁along ▁with ▁his ▁ment or ▁Wei ▁Y isan ▁( <0xE9> <0xAD> <0x8F> <0xE7> <0x9B> <0x8A> 三 ) ▁in ▁ 1 9 2 1 . ▁In ▁ 1 9 2 6 , ▁he ▁participated ▁in ▁the ▁Northern ▁Ex ped ition ▁as ▁command ing ▁officer ▁of ▁ 2 6 th ▁B de ▁ 4 th ▁Army , ▁and ▁his ▁out standing ▁command ▁earned ▁him ▁a ▁promotion ▁to ▁CO ▁of ▁ 2 nd ▁Division ▁and ▁then ▁ 5 4 th ▁Division . ▁After ▁the ▁Central ▁Pla ins ▁War ▁he ▁was ▁promoted ▁to ▁CO ▁of ▁ 9 th ▁Army . ▁ ▁Ha o ▁rel in qu ished ▁his ▁command ▁in ▁ 1 9 3 7 ▁after ▁batt ling ▁commun ist ▁forces ▁for ▁dec ades , ▁but ▁returned ▁after ▁the ▁Marco ▁Pol o ▁Bridge ▁Inc ident . ▁By ▁the ▁time ▁he ▁got ▁back ▁to ▁the ▁front ▁line ▁from ▁S ich uan , ▁the ▁I J A ▁had ▁already ▁broken ▁through ▁Yan men ▁Pass ▁and ▁were ▁conver ging ▁on ▁X ink ou . ▁Under ▁Wei ▁Li hu ang ' s ▁ 1 4 th ▁Army ▁Group , ▁Ha o ▁led ▁his ▁ 9 th ▁Army ▁and ▁Sh an xi ▁cli que ' s ▁ 1 9 th , ▁ 3 5 th ▁and ▁ 6 1 st ▁Arm ies ▁in ▁the ▁defense ▁of ▁X ink ou . ▁ ▁During ▁the ▁battle , ▁Ha o ' s ▁staff ▁suggested ▁to ▁him ▁to ▁change ▁to ▁ordinary ▁soldier ' s ▁uniform ▁for ▁safety ▁reasons , ▁but ▁Ha o ▁refused , ▁a ▁ref