Our modern city i too crowded， and to olve the problem， three propoal are put forward. Mot people believe that we hould fit practie the policy Late Marriage and One Couple， One Child in order to reduce the birth rate. Secondly， the city government mut have a tight control over rural people entering citie to engage themelve in trade or do variou phyical job o a to leen the preure on the city caued by the increaed population. Finally more and more people ugget that living block with hopping center， chool， hopital a well a cinema and theatre round them or even atellite town hould be built in city uburb or the countryide round the citie. In thi way city citizen will be encouraged to move there to live and work. If thee three propoal are well carried out， the city population will be greatly reduced.