, ▁a ▁gentleman ▁of ▁the ▁household ▁from ▁the ▁" R ap id ▁as ▁Tig ers " ▁( <0xE8> <0x99> <0x8E> <0xE8> <0xB3> <0x81> ) ▁division ▁of ▁the ▁imperial ▁gu ards . ▁In ▁the ▁period ▁after ▁ 1 9 0 ▁when ▁C ao ▁C ao ▁was ▁constantly ▁w aging ▁war ▁against ▁other ▁rival ▁war l ords , ▁it ▁is ▁not ▁known ▁where ▁C ao ▁Pi ▁and ▁Lady ▁Bian ▁were , ▁or ▁what ▁they ▁did . ▁The ▁l one ▁reference ▁to ▁C ao ▁Pi ▁during ▁this ▁period ▁was ▁in ▁ 2 0 4 , ▁when ▁he ▁took ▁Y uan ▁X i ' s ▁wid ow ▁Lady ▁Z hen ▁as ▁his ▁wife . ▁ ▁Su cc ession ▁struggle ▁with ▁C ao ▁Z hi ▁The ▁next ▁immediate ▁reference ▁to ▁C ao ▁Pi ' s ▁activities ▁was ▁in ▁ 2 1 1 , ▁when ▁he ▁was ▁appointed ▁General ▁of ▁the ▁House hold ▁for ▁All ▁Pur poses ▁( 五 官 中 郎 <0xE5> <0xB0> <0x87> ) ▁and ▁Vice ▁Imperial ▁Chan cell or ▁( <0xE5> <0x89> <0xAF> <0xE4> <0xB8> <0x9E> 相 ). ▁This ▁position ▁placed ▁him ▁second ▁to ▁his ▁father , ▁who ▁was ▁then ▁Imperial ▁Chan cell or ▁( <0xE4> <0xB8> <0x9E> 相 ) ▁and ▁the ▁de ▁fact o ▁head ▁of ▁government ▁in ▁China . ▁The ▁el dest ▁of ▁all ▁of ▁C ao ▁C ao ' s ▁sons , ▁C ao ▁Ang , ▁had ▁died ▁early , ▁so ▁C ao ▁Pi ▁was ▁regarded ▁as ▁the ▁el dest ▁among ▁all ▁his ▁father ' s ▁sons . ▁Besides , ▁C ao ▁Pi