' s ▁mother ▁had ▁also ▁become ▁C ao ▁C ao ' s ▁official ▁sp ouse ▁after ▁C ao ▁C ao ' s ▁first ▁wife ▁Lady ▁D ing ▁was ▁de posed . ▁C ao ▁Pi ▁thus ▁became ▁the ▁pres um pt ive ▁he ir ▁to ▁his ▁father . ▁ ▁However , ▁C ao ▁Pi ' s ▁status ▁as ▁he ir ▁was ▁not ▁immediately ▁made ▁legal , ▁and ▁for ▁years ▁there ▁were ▁ling ering ▁doub ts ▁on ▁whom ▁C ao ▁C ao ▁intended ▁to ▁make ▁he ir . ▁C ao ▁C ao ▁greatly ▁fav oured ▁C ao ▁Z hi ▁( his ▁third ▁son ▁with ▁Lady ▁Bian ), ▁who ▁was ▁known ▁for ▁his ▁literary ▁tal ents . ▁Both ▁C ao ▁Pi ▁and ▁C ao ▁Z hi ▁were ▁tal ented ▁po ets , ▁but ▁C ao ▁Z hi ▁was ▁more ▁highly ▁regarded ▁as ▁a ▁poet ▁and ▁speaker . ▁By ▁ 2 1 5 , ▁the ▁brothers ▁appeared ▁to ▁be ▁in ▁harm ony ▁with ▁each ▁other , ▁but ▁each ▁had ▁his ▁own ▁group ▁of ▁supp or ters ▁and ▁close ▁associ ates ▁eng aging ▁the ▁other ▁side ▁in ▁c land est ine ▁rival ry . ▁Initial ly , ▁C ao ▁Z hi ' s ▁party ▁appeared ▁to ▁be ▁prev ail ing , ▁and ▁in ▁ 2 1 6 ▁they ▁were ▁successful ▁in ▁f als ely ▁acc using ▁two ▁officials ▁supporting ▁C ao ▁Pi ▁– ▁C ui ▁Yan ▁and ▁Ma o ▁J ie . ▁C ui ▁Yan ▁was ▁executed , ▁while ▁Ma o ▁J ie ▁was ▁de posed . ▁However