▁References ▁ ▁Category : R ivers ▁of ▁Oregon ▁Category : R ivers ▁of ▁Jackson ▁County , ▁Oregon <0x0A> </s> ▁You y u ▁County , ▁also ▁known ▁by ▁its ▁Chinese ▁name ▁You y ux ian , ▁is ▁a ▁county ▁under ▁the ▁administration ▁of ▁the ▁pre fect ure - level ▁city ▁of ▁Sh u oz hou , ▁in ▁the ▁north west ▁of ▁Sh an xi ▁Province , ▁China . ▁It ▁borders ▁Inner ▁Mong olia ▁to ▁the ▁north ▁and ▁west . ▁ ▁History ▁Sh an w u , ▁south ▁of ▁present - day ▁You y ux ian , ▁was ▁the ▁seat ▁of ▁Yan men ▁Command ery ▁during ▁the ▁Q in ▁and ▁Western ▁Han . ▁The ▁post ▁moved ▁to ▁Y ingu an ▁sout heast ▁of ▁present - day ▁Sh u oz hou ▁under ▁the ▁Eastern ▁Han ▁and ▁further ▁south ▁to ▁Da ix ian ▁under ▁the ▁Kingdom ▁of ▁Wei . ▁ ▁Geography ▁E lev ations ▁are ▁generally ▁higher ▁in ▁the ▁south ▁of ▁the ▁county , ▁in ▁which ▁flows ▁the ▁C ang t ou ▁River ▁(); ▁You y u ▁reaches ▁a ▁north - s outh ▁extent ▁of ▁ ▁and ▁east - west ▁width ▁of ▁. ▁The ▁Great ▁Wall ▁dem arc ates ▁the ▁north western ▁border ▁with ▁Inner ▁Mong olia ' s ▁Li ang ch eng ▁and ▁Hor inger ▁count ies ; ▁within ▁the ▁province , ▁You y u ▁borders ▁Zu oy un ▁County ▁to ▁the ▁east , ▁Sh any in ▁County ▁and ▁P ing lu ▁District ▁to ▁the ▁south . ▁ ▁Cl imate ▁You y u ▁has ▁a ▁mon