1953-1978

From 1953, central government launched the “First Five Year Plan” at national level, Xi’an stepped into “socialist construction period”, “Work-unit” concept was applied every where. The planned population in Xi’an is 1.2 million on the urban region of 131 sq.km in 1953-1972’s master plan. This edition settled the main structure for Xi’an, which is cross axis base on the walled city area. Walled city was designed as mainly residential and commercial and to develop the city on the base of the Xi’an Walled City. The population growth brings the urgent need for urban housing, meanwhile, modern housing with state-ownership start to replacing the private ones with the typology the figure shows.(Fig.7) Until 1955, in Xi’an the housing which are private ownership in total have reduced to 35.2% from 82.3%, and it’s continue to shrink down to 14.23%\cite{Liu2014西安城市化的住房建设响应}. With this background of transformation, 296000 sq.m housing was built in total. As we can see from the data, generally this kind of plot is twice or more times larger than the traditional land plot with a built coverage around 50%.