An Urban architecture experiment. A proposal or urban intervention to tackle the problem of slum housing in the developing city with density is the main urban problem, this project suggests to apply a vertical strategies in housing concept for the slum community in the center of city. the need of green area for healthy city can only be obtained by a preventive action of agglomeration of slum growth. the strategy is to replace them from the informal horizontal settlement condition into a less informal vertical one. Provide a vertical plot for them to start their own houses unit and also provide the main infrastructure for them to access the city services. The idea is to keep the informal characters in new environment.