Infrastructures for building Beijing into an international activities aggregation city consist mainly of stadium infrastructure,transportation infrastructure and public services infrastructure.Stadium infrastructures have the problems of lacking of stadiums,imbalance layout,incomplete comprehensive functions,absence of supporting service,etc. Transportation infrastructures face the problems of lagging public transportation construction,insufficient international airline capacity,serious traffic jams resulting from poor transportation management,etc. Public services infrastructures have the problems of low supply service level,rigid institution mechanism and lacking of humanization and facilitation,etc. Generally speaking,the carrying capacity of Beijing's urban infrastructure to create itself as an international activities aggregation city is still in lower stage,and it is necessary to continue to improve the construction and carrying capacity of Beijing's urban infrastructure. <<