t　us　anticipate　him　and　set　out　an　ambush　about　our　camp。　Let　two　bodies　of　our　troops　be　hidden　outside　and　two　others　take　the　occasion　to　raid　the　camp　of　the　enemy。〃

〃I　thought　of　such　a　scheme　myself；〃　said　Cao　Zhen。　〃It　exactly　suits　my　plans。〃

So　Cao　Zhen　gave　order　to　Cao　Zun　and　Zhu　Zan：　〃You　are　to　take　ten　thousand　troops　each；　get　away　by　the　rear　of　the　mountain；　and　look　out　for　the　passing　of　the　soldiers　of　Shu。　When　they　have　gone　by；　you　are　to　make　for　their　camp。　But　you　are　only　to　attempt　a　raid　if　they　have　left。〃

Cao　Zun　and　Zhu　Zan　took　the　order　and　left。　Then　the　mander…in…Chief　arranged　with　Guo　Huai　each　to　lead　a　force　and　hide　outside　the　camp　to　wait　for　the　raid　of　Shu。　Only　a　few　soldiers　were　to　be　left　within　to　make　a　fire　if　the　enemy　were　seen　to　be　ing。　And　all　generals　set　about　the　necessary　preparations。

When　Zhuge　Liang　reached　his　tent；　he　called　to　him　Zhao　Yun　and　Wei　Yan；　and　said　to　them；　〃You　two　are　to　make　a　night　attack。〃

〃Cao　Zhen　is　a　man　of　experience　and　will　be　on　the　lookout；〃　ventured　Wei　Yan。

〃But　that　is　just　what　I　want：　I　want　him　to　know　we　shall　attack　tonight。　He　will　then　put　some　troops　in　hiding　in　rear　of　the　Qishan　Mountains；　who　will　make　for　our　camp　as　soon　as　they　see　us　pass　toward　theirs。　I　am　sending　you　to　let　yourselves　be　seen　passing　the　hill。　but　you　are　to　camp　behind　it　and　at　a　distance。　When　the　soldiers　of　Wei　attack　this　camp；　you　will　see　a　signal。　Then　Wei　Yan　will　hold　the　approach　to　the　hill；　and　Zhao　Yun　will　make　his　way　back　in　fighting　order。　He　will　meet　the　army　of　Wei　returning　and　will　let　them　pass。　The　enemy　will　assuredly　fall　to　fighting　among　themselves；　and　we　shall　finish　the　battle。〃

These　two　having　gone　away　to