edict　was　issued　and　sent　to　Zhuge　Liang。　The　messenger　was　at　once　received　as　soon　as　he　reached　Qishan。

〃The　Emperor　is　young；　and　there　is　some　jealous　persons　by　his　side；〃　said　Zhuge　Liang　sadly。　〃I　was　just　going　to　achieve　some　solid　success。　Why　am　I　recalled？　If　I　go　not；　I　shall　insult　my　Prince。　If　I　retire；　I　shall　never　get　such　a　chance　again。〃

〃If　the　army　retire；　Sima　Yi　will　attack；〃　said　Jiang　Wei。

〃I　will　retire　in　five　divisions。　Thus　today　this　camp　goes。　Supposing　that　there　are　a　thousand　soldiers　in　the　camp；　then　I　shall　have　two　thousand　cooking　places　prepared；　or　if　there　are　three　thousand　soldiers；　then　four　thousand　cooking　plates　shall　be　got　ready；　and　so　on；　increasing　the　cooking　arrangements　as　the　troops　are　sent　away。〃

＇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。　。。。。。

Yang　Yi　said；　〃In　the　days　of　old；　when　Sun　Bin*　was　attacking　Pang　Juan；　Sun　Bin　decreased　the　cooking　arrangements　as　the　soldiers　were　increased。　Why　do　you　reverse　this；　O　Prime　Minister？〃

〃Because　Sima　Yi　is　an　able　leader　and　would　pursue　if　he　knew　we　were　retreating。　But　he　would　recognize　the　probability　of　an　ambush；　and　if　he　sees　an　increase　in　the　cooking　arrangements　in　a　camp；　he　will　be　unable　to　conclude　whether　the　troops　have　gone　or　not；　and　he　will　not　pursue。　Thus　I　shall　gradually　withdraw　without　loss。〃

The　order　for　retreat　was　given。

Confident　of　the　effect　that　Gou　An's　lying　report　would　produce；　Sima　Yi　waited　for　the　retreat　of　the　Shu　army　to　begin。　He　was　still　waiting　when　the　scouts　told　him　the　enemy's　camps　were　empty。　Wishing　to　make　s