ately ▁in ▁need ▁of ▁a ▁buffer ▁state , ▁King ▁P ing ▁further ▁promised ▁Duke ▁X i ang ▁that ▁any ▁lands ▁the ▁Q in ▁cl an ▁could ▁se ize ▁from ▁the ▁R ong ▁tribes ▁west ▁of ▁Q ish an ▁( the ▁former ▁heart land ▁of ▁Z hou ), ▁they ▁could ▁keep ▁perman ently ▁as ▁their ▁own ▁f ief . ▁ ▁As ▁a ▁march er ▁cl an ▁already ▁with ▁a ▁bitter ▁history ▁with ▁the ▁X ir ong ▁tribes , ▁the ▁new ▁noble ▁state ▁of ▁Q in ▁were ▁greatly ▁motiv ated ▁by ▁this ▁royal ▁promise , ▁and ▁success ive ▁generation ▁of ▁Q in ▁r ul ers ▁died ▁in ▁battle ▁against ▁their ▁X ir ong ▁enemy , ▁three ▁of ▁the ▁largest ▁being ▁M ian z hu ▁( <0xE7> <0xB6> <0xBF> <0xE8> <0xAB> <0xB8> , ▁near ▁modern - day ▁T ians hui ), ▁D ali ▁( 大 <0xE8> <0x8D> <0x94> , ▁near ▁modern - day ▁D ali ▁County ), ▁and ▁Y iqu . ▁ ▁Ar ound ▁ 6 5 0 ▁BC , ▁Y iqu ▁had ▁conquer ed ▁most ▁of ▁its ▁surrounding ▁smaller ▁tribes ▁and ▁began ▁to ▁expand ▁east wards , ▁bringing ▁it ▁into ▁direct ▁conflict ▁with ▁the ▁state ▁of ▁Q in . ▁ ▁In ▁ 6 5 1 ▁BC , ▁one ▁of ▁the ▁other ▁larger ▁X ir ong ▁tribes , ▁M ian z hu , ▁rec ru ited ▁a ▁Jin ▁man ▁in ▁ex ile ▁named ▁You ▁Yu ▁( 由 <0xE4> <0xBD> <0x99> ) ▁as ▁the ▁amb assador ▁to ▁Q in ▁in ▁order ▁to ▁improved ▁the ▁stra ined ▁diplom