▁A oj ian ▁and ▁returned ▁with ▁ 1 0 , 0 0 0 ▁capt ives ▁as ▁well ▁as ▁thousands ▁of ▁liv est ock . ▁Two ▁of ▁P un u ' s ▁chief s ▁also ▁defect ed ▁to ▁join ▁Bi . ▁P un u ▁was ▁forced ▁to ▁re loc ate ▁north ▁across ▁the ▁G obi ▁Des ert . ▁ ▁P un u ' s ▁brother ▁escaped ▁from ▁Bi ▁but ▁decided ▁to ▁set ▁himself ▁up ▁as ▁another ▁ch any u . ▁He ▁was ▁defeated ▁by ▁P un u ▁within ▁a ▁few ▁months . ▁ ▁In ▁ 5 1 ▁AD , ▁P un u ▁sent ▁en vo ys ▁to ▁negoti ate ▁with ▁the ▁Han ▁in ▁W uwe i ▁Command ery , ▁but ▁they ▁were ▁turned ▁back . ▁P un u ▁sent ▁en vo ys ▁again ▁in ▁ 5 2 ▁and ▁ 5 5 ▁AD ▁to ▁no ▁avail . ▁At ▁the ▁same ▁time ▁P un u ▁sub j ug ated ▁the ▁o asis ▁states ▁of ▁the ▁Western ▁Reg ions ▁and ▁forced ▁them ▁to ▁send ▁t ribute ▁to ▁the ▁X ion gnu ▁court . ▁ ▁In ▁ 6 2 ▁AD , ▁the ▁Northern ▁X ion gnu ▁made ▁a ▁major ▁ra id ▁but ▁was ▁rep elled . ▁ ▁In ▁ 7 3 ▁AD , ▁Dou ▁Gu ▁led ▁a ▁force ▁of ▁ 1 2 , 0 0 0 ▁against ▁the ▁X ion gnu ▁and ▁defeated ▁H uy an ▁in ▁modern ▁n ort he astern ▁X in ji ang . ▁ ▁In ▁ 7 5 ▁AD , ▁the ▁X ion gnu