HelptopromiseQINGYAN

　　Asof2005，Chinaalreadyhas31naturallandscapeandhistoricalsiteshavebeendeclaredasaworldculturalheritage，whenweareimmersedintheworldwithjoyandpridetosharethese，whenalmostnoonestoppedtothinkaboutthoseofusthefutureoftheworld‘streasures。
　　Asweknow，thankstoitsvastterritoryofChina，itissuchavastterritorythatshehasmanydifferenttypesofclimaticconditions，onlygavebirthtotherichandcolorfulChineseculture。However，thebenefitswillalsohaveanegativerole，theDunhuangMogaoGrottoesisonesuchexample。Forthousandsofyears，ourforefathersexhaustedtheirlifetimeinthisgreatanddeepcaves，theknowledgeandwisdomwithbrushcondensatecastineachsideofthewall，hopingthatknowledgeandwisdomtobeimmortalized。Atthattime，whohadthoughtthatonedaythesehugeandmagnificentworkswillbedamagetotheforcesofnature。
　　MogaoGrottoesislocatedinChina’snorthwest，toconnecttheEurasiancontinentintheSilkRoadTrail，isalongroadthatthelargesttreasure。Despiteahundredyearsagoithadbeenstolen，butitdamagedthebiggestreasonisthatcontinentalclimatebroughtaboutbythedisaster。MongoliabytheNorthtothehighpressureeffectsofclimateDunhuangregionperennialdrought，sandstormsfrequent，annualprecipitationisonlymorethan40millimeters，whiletheannualevaporationisashighasmorethan4。3thousandmillimeters，uptoseveralthousandyearsoftime，ourMogaoGrottoeshasbeenfrequentlyattackedbytheduststorms，coupledwithlongtermdroughts，earthquakesandrainerosionoftheouterwallofacaveonceeroded，constantlythinning。Tomakemattersworse，cavemuralshavebeguntochangecolor，fromA，crispandevenoffbase。Fromthe20thcentury，thebeginningofthe40s，theChinesepeoplebegantohaveaconsciousacttogethertoprotectourgreathistoricaltreasures。First，peoplehavebeenbuiltintheclifffacesandwall，latertriedtodigantiShagou，soontobefilledsand。Inrecentyears，wefinallyfoundthesandandsandcontrolcanbeagoodway。Firstofall，weinthesandandgrass，thegrassallthesandboxcanfirmlyfixedinplace，aftertwokilometerstocreateashelterbelts，sothattheeffectiveregulationofregionalclimate。Scientistssaidthatinthiswaycanpreventnearly80ofthesandintotheMogaointernal。
　　Intheprotectionofourpreciousworldculturalheritage，wereallymadesomeencouragingprogress，butitshouldnotonlybeatemporaryrescueworks。Thesefactorsbroughtaboutbynaturalhazards，willnodoubtcontinue，threatsstillexistfortheMogaoGrottoes，forwhicheffortsalsoneedtolastforever，generationaftergeneration。Dearfriends，letusjoinhandstogethertoprotectoursplendidancientcivilization。Wemayalsoslightlyyounger，butaslongaswehaveafirmbelief，jewelswillshineforever。Ourspiritwillspreadfromonepersontoanotherperson。