Simulation of urban construction land expansion based on the perspective of urban system planning 并列题名：Simulation of urban construction land expansion based on the perspective of urban system planning Research in urban constrution land regulation based on inventory planning Urban comparative analysis from the perspective of urban planning 并列题名：Urban comparative analysis from the perspective of urban planning Research on the multidimensional land use classification system in the perspective of urban and country planning 并列题名：Research in urban constrution land regulation based on inventory planning