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1、YunnanProvinceneartheLancangRiver,theChinesepartoftheriverthatiscalledtheMekongRiverinothercountries.WangWeisoongottheminterestedincyclingtoo.Aftergraduatingfromcollege.wefinallygotthechancetotakeabiketrip.Iaskedmysister,"Wherearewegoing?"Itwasmysisterwhof
2、irsthadtheideatocyclealongtheentireMekongRiverfromwhereitbeginstowhereitends.Nowsheisplanningourscheduleforthetrip. Iamfondofmysisterbutshehasoneseriousshortcoming.Shecanbereallystubborn.Althoughshedidn'tknowthebestwayofgettingtoplaces,sheinsistedthatsheor
3、ganizethetripproperly.Now,Iknowthattheproperwayisalwaysherway.Ikeptaskingher,"Whenareweleavingandwhenarewecomingback?"Iaskedherwhethershehadlookedatamapyet.Ofcourse,shehadn't;mysisterdoesn'tcareaboutdetails.SoItoldherthatthesourceoftheMekongisinQinghaiProv
4、ince.Shegavemeadeterminedlook—thekindthatsaidshewouldnotchangehermind.WhenItoldherthatourjourneywouldbeginatanaltitudeofmorethan5,000metres,sheseemedtobeexcitedaboutit.WhenItoldhertheairwouldbehardtobreatheanditwouldbeverycold,shesaiditwouldbeaninteresting
5、experience.Iknowmysisterwell.Onceshehasmadeuphermind,nothingcanchangeit.Finally,Ihadtogivein. Severalmonthsbeforeourtrip,WangWeiandIwenttothelibrary.Wefoundalargeatlaswithgoodmapsthatshoweddetailsofworldgeography.FromtheatlaswecouldseethattheMekongRiverbeg
6、insinaglacieronaTibetanmountain.Atfirsttheriverissmallandthewaterisclearandcold.Thenitbeginstomovequickly.Itbecomesrapidsasitpassesthroughdeepvalleys,travellingacrosswesternYunnanProvince.Sometimestheriverbecomesawaterfallandenterswidevalleys.Wewerebothsur
7、prisedtolearnthathalfoftheriverisinChina.AfteritleavesChinaandthehighaltitude,theMekongbecomeswide，brownandwarm.AsitentersSoutheastAsia,itspaceslows.Itmakeswidebendsormeandersthroughlowvalleystotheplainswherericegrows.Atlast,theriverdeltaenterstheSouthChin
8、aSea. PART2ANIGHTINTHEMOUNTAINS Althoughitwasautumn,thesnowwasalreadybeginningtofallinTibet.Ourlegsweresoheavyandcoldthattheyfeltlikeblocksofice.Haveyoueverseensnowmenridebicycles?That’swhatwelookedlike!Along
