正 Ⅰ.Introduction Since the start of the program in 1990,Beijing's Oldand Dilapidated Housing Renewal has received considera-ble attention from all areas of society-from government of-ficials and professionals as well as ordinary citizens.The re-newal program has not only exerted a major impact on theold city areas of Beijing like the demolition of the old CityWall and the Pai Lou(Memorial Archways),but has alsobeen a sensitive issue related to housing problems whichmay affect hundreds of thousands of residents both in theold city and in other parts of Beijing.Furthermore,the pres-ervation of architectural relics and the historic core of Beij-ing Old City is now receiving more and more attention.Asa result,research on Beijing's housing renewal program in-volves a broad range of issues covering city development,housing construction and Old City preservation. The work of our group has involved lookingcomprehensively at all aspects of residential area renewal inold city areas-the economic,social and enviro
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