Fig. 5From: Analysis of the systematic conservation of China's petroleum industrial heritage: a case study and analysis of the petroleum industrial heritage in DaqingDaqing’s petroleum industrial heritage (intangible heritage, tangible heritage). A Job responsibility system and North No. 2 water-injection station. B 'Three values, four obligations' and Zhong IV Crew. C 'Revolutionary spirit of the five shovels' and Chuangyezhuang (Source: the author)Back to article page