'
now,thepopulationquestionalreadytheworldwidebasisquestion,wemustpayattention.intheworldpopulationachieved6,000,000,000,becausethepopulationquestionhasbeenintheworldthemostmajorproblemoverpopulationbringsmanyquestions,causedthedevelopingcountrypopulationtoaountfortheworldpopulation4/5,butchinaadoptedthebirthcontrolpolicytohavetheeffect.