▁road ▁between ▁Tang ▁and ▁N anz ha o . ▁ ▁Y im oux un , ▁in ▁anger ▁over ▁this ▁action , ▁with d rew ▁his ▁own ▁troops ▁and ▁did ▁not ▁aid ▁in ▁the ▁T uf an ▁campaign . ▁ ▁Wei ▁subsequently ▁defeated ▁T uf an ▁forces ▁at ▁Q ing xi ▁Pass ▁( 清 溪 <0xE9> <0x97> <0x9C> , ▁in ▁modern ▁Ya ' an , ▁S ich uan ), ▁and ▁after ▁several ▁further ▁defe ats , ▁T uf an ▁forces ▁with d rew . ▁ ▁In ▁ 7 8 9 , ▁Wei ▁sent ▁his ▁officer ▁C ao ▁You da o ▁( <0xE6> <0x9B> <0xB9> 有 道 ), ▁in ▁conj unction ▁with ▁forces ▁of ▁D ong man ▁and ▁Li ang lin man ▁( <0xE5> <0x85> <0xA9> 林 <0xE8> <0xA0> <0xBB> , ▁located ▁in ▁modern ▁Li ang sh an ), ▁attacked ▁T uf an ' s ▁Q ing hai ▁( 青 海 ) ▁and ▁L ach eng ▁( <0xE8> <0x87> <0x98> 城 ) ▁Circ uits ▁( both ▁located ▁sout heast ▁of ▁Q ing hai ▁Lake ), ▁and ▁the ▁forces ▁batt led ▁at ▁X i ▁Pref ect ure ▁( <0xE9> <0x9B> <0x9F> 州 , ▁in ▁modern ▁Li ang sh an ). ▁ ▁The ▁T uf an ▁forces ▁were ▁defeated , ▁and ▁during ▁the ▁battle , ▁and ▁the ▁T uf an ▁general ▁Q iz ang ▁Z hez he ▁( <0xE4> <0xB9> <0x9E> 藏 <0xE9> <0x81> <0xAE> <0xE9> <0x81> <0xAE> ) ▁was ▁killed . ▁ ▁It ▁was ▁said ▁that ▁after ▁Q iz ang ' s ▁death , ▁Wei ▁was