▁ ▁After ▁Form er ▁Sh u ' s ▁fall , ▁however , ▁with ▁Li ▁C un x u ▁killing ▁the ▁major ▁gener als ▁Gu o ▁Ch ong ta o ▁and ▁Li ▁J il in ▁( Z hu ▁You q ian ), ▁Li ▁Sh ao chen ▁became ▁app reh ensive ▁and ▁decided ▁to ▁re bel , ▁but ▁was ▁subsequently ▁defeated ▁and ▁executed . ▁ ▁Background ▁and ▁defe ction ▁to ▁Later ▁Li ang ▁ ▁K ang ▁Yang x iao ▁was ▁said ▁to ▁be ▁a ▁tribes man ▁from ▁the ▁Da ib ei ▁region ▁( 代 北 , ▁i . e ., ▁the ▁region ▁north ▁of ▁modern ▁X in z hou , ▁Sh an xi ), ▁who ▁served ▁as ▁a ▁soldier ▁at ▁Hed ong ▁Circ uit ▁( 河 東 , ▁head qu arter ed ▁in ▁modern ▁Tai y uan , ▁Sh an xi ). ▁ ▁At ▁one ▁point , ▁he ▁was ▁guilty ▁of ▁a ▁crime , ▁and ▁he ▁fled ▁to ▁X uan w u ▁Circ uit ▁( <0xE5> <0xAE> <0xA3> 武 , ▁head qu arter ed ▁in ▁modern ▁Ka if eng , ▁Hen an ). ▁ ▁( Wh ile ▁the ▁accounts ▁do ▁not ▁give ▁a ▁date ▁for ▁his ▁defe ction , ▁the ▁fact ▁that ▁the ▁History ▁of ▁the ▁Five ▁D ynast ies ▁referred ▁to ▁X uan w u ▁as ▁" B ian ▁Li ang " ▁( <0xE6> <0xB1> <0xB4> <0xE6> <0xA2> <0x81> ) ▁by ▁its ▁pre fect ural ▁and ▁regional ▁design ations , ▁suggests ▁that ▁this ▁occurred ▁in ▁the ▁very ▁late ▁Tang ▁D ynast y , ▁when