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now,thepopulationquestionalreadytheworldwidebasisquestion,wemustpayattention.intheworldpopulationachieved6,000,000,000,becausethepopulationquestionhasbeenintheworldthemostmajorproblemoverpopulationbringsmanyquestions,causedthedevelopingcountrypopulationtoaccountfortheworldpopulation4/5,butchinaadoptedthebirthcontrolpolicytohavetheeffect.