icles ▁of ▁the ▁Il k han ate ▁in ▁Pers ia . ▁His ▁works ▁says ▁about ▁the ▁borders ▁of ▁the ▁seven ▁cl imes ▁( old ▁world ), ▁rivers , ▁major ▁cities , ▁places , ▁climate , ▁and ▁Mong ol ▁y ams ▁( rel ay ▁stations ). ▁The ▁Great ▁Khan ▁Kh ub il ai ' s ▁amb assador ▁and ▁minister , ▁Bol ad , ▁had ▁helped ▁R ash id ' s ▁works ▁in ▁relation ▁to ▁the ▁Mong ols ▁and ▁Mong olia . ▁Thanks ▁to ▁P ax ▁Mong ol ica , ▁the ▁eastern ers ▁and ▁the ▁western ers ▁in ▁Mong ol ▁domin ions ▁were ▁able ▁to ▁gain ▁access ▁to ▁one ▁another ' s ▁ge ographical ▁materials . ▁ ▁The ▁Mong ols ▁required ▁the ▁nations ▁they ▁conquer ed ▁to ▁send ▁ge ographical ▁maps ▁to ▁the ▁Mong ol ▁headquarters . ▁ ▁One ▁of ▁medieval ▁Pers ian ▁work ▁written ▁in ▁north west ▁Iran ▁can ▁clarify ▁the ▁historical ▁ge ography ▁of ▁Mong olia ▁where ▁G eng his ▁Khan ▁was ▁born ▁and ▁un ited ▁the ▁Mong ol ▁and ▁Turk ic ▁nom ads ▁as ▁recorded ▁in ▁native ▁sources , ▁especially ▁the ▁Secret ▁History ▁of ▁the ▁Mong ols . ▁ ▁Map ▁of ▁relay ▁stations , ▁called ▁" y am ", ▁and ▁strateg ic ▁points ▁existed ▁in ▁the ▁Y uan ▁D ynast y . ▁The ▁Mong ol ▁cart ography ▁was ▁en rich ed ▁by ▁trad itions ▁of ▁ancient ▁China ▁and ▁Iran ▁which ▁were ▁now ▁under ▁the ▁Mong ols . ▁ ▁Because ▁the ▁Y uan ▁court ▁often ▁requested ▁the ▁western ▁Mong ol ▁k han ates