policies and regulations of underground
01.Benxi urban underground space development and utilization management regulations (2002)
02.Huludao urban underground space development and utilization management approach (2005)
04.Liaoyuan urban underground space development and utilization management regulations (2008)
08.Guangzhou city underground space development and utilization management method (2011)
09.Gongyi urban underground space development and utilization management regulations (2011)
13.Ji’nan city underground space development and utilization management method (2013)
14.Dezhou urban underground space development and utilization management approach (2014)