From　Yuan　Shao's　camp；　the　flames　of　the　burning　depot　were　seen　away　in　the　north；　and　they　knew　what　they　meant。　Yuan　Shao　hastily　summoned　his　officers　to　a　council　to　send　a　rescue　party。

＇e＇　Sun　Bin　military　strategist；　a　descendant　of　Sun　Zi。　Sun　Bin　served　as　military　counselor　during　the　Warring　States　period　in　Qi。　He　wrote　a　treatise　named　The　Art　of　War　of　Sun　Bin。　。。。。。

＇e＇　In　the　Warring　States　period；　Wei　was　attacking　Zhao　when　Zhao　sent　to　Qi　to　seek　help。　Sun　Bin；　a　strategist　of　Qi；　devised　a　scheme　to　attack　Wei's　important　base。　Facing　this　new　threat；　Wei　had　to　withdraw　its　force　to　defend　the　base；　and　thus　Zhao　was　relieved。　Sun　Bin　then　laid　an　ambush　on　Wei's　retreat　and　scored　a　victory　for　Qi。

Zhang　He　offered　to　go　with　Gao　Lan；　but　Guo　Tu　said；　〃You　may　not　go。　It　is　certain　that　Cao　Cao　is　there　in　person；　wherefore　his　camp　is　undefended。　Let　loose　our　soldiers　on　the　camp；　and　that　will　speedily　bring　Cao　Cao　back　again。　This　is　how　Sun　Bin*　besieged　Wei　and　thereby　rescued　Zhao*。〃

But　Zhang　He　said；　〃Not　so；　Cao　Cao　is　too　wily　not　to　have　fully　prepared　against　a　chance　attack。　If　we　attack　his　camp　and　fail　and　Chunyu　Qiong　should　be　caught；　we　shall　all　be　captured　too。〃

Guo　Tu　said；　〃Cao　Cao　will　be　too　intent　on　the　destruction　of　the　grain　to　think　of　leaving　a　guard。　I　entreat　you　to　attack　his　camp。〃

So　Yuan　Shao　sent　five　thousand　soldiers　under　Zhang　He　and　Gao　Lan　to　attack　Cao　Cao's　camp；　and　he　sent　ten　thousand　with　Jiang　Qi　to　go　to　recover　the　grain　store。

Now　after　overing　Chunyu　Qiong；　Cao　Cao's　troops　dressed　themselves　in　the　armor　and　clothing　of　the　defeated　soldiers　and　put　out　their　emblems；　thus　posing　as　defeated　force　running　back　to　their　own　headquarters。