Fig. 12From: Analysis of the systematic conservation of China's petroleum industrial heritage: a case study and analysis of the petroleum industrial heritage in DaqingMorphology Evolution of Daqing’s Urban spatial form, 1960–1990. A Daqing District in the 1960s. B Daqing City in the 1980s. C Daqing City in the 1990s (Source: Liu 2010; Daqing Municipal Planning Bureau 1989, 2000, 1995; redrawn by the author)Back to article page