BR	The ratio of urban built-up area
BTH	Beijing-Tianjin-Hebei
CPEZ	Chengdu Plain Economic Zone
EC	Energy consumption per unit of output
GDP	Gross regional product
GDPP	Per capita gross regional product
GR	Ratio of green space
PD	Population density
PP	Per capita park area
PRD	Pearl River Delta
SDM	Spatial model
SEDAC	Socioeconomic data and applications center
SEM	Spatial error model
SIR	The ratio of secondary industry
SLM	Spatial lag model
STIRPAT	Stochastic impacts by regression on population, affluence, and technology
YRD	Yangtze River Delta