In the second half of the nineteenth CenturyChinaafterthe Opium War,thewhole nationfrom top to bottominturn the world upside down.Because theimpact of external forceis becoming more and more serious,people'scognition ofmodern diplomacyalsodeepened.After the Opium War,the Qing GovernmentForeignmentalitychangeandWesternsentoverseastoQingsentabroadtohelp acertain.On this basis,this article on Pu AnchentheAmerican asthefirstdiplomaticenvoysof thereasons were analyzed,thatare availablein the historicalconditions,personal factorsplay a criticaland decisive role,have a significant impact on theentire history ofthe求采纳!你我都加分!的在最后！！很正长！什么的！我的！你的！不都是？