Research on the Impact Evaluation of Digital Finance on the Synergy between Economic Development and Ecological Environment

Table 6

Coupling types and coupling stages in 1990.

Region	X	Y	C	D	Coupling type	Coordination degree	Coupling stage
Beijing	0.53	0.59	0.28	0.25	Synchronized model	Low coordination	Low-level coupling
Tianjin	0.38	0.42	0.2	0.25	Synchronized model	Low coordination	Low-level coupling
Shanghai	0.59	0.36	0.22	0.23	Environmental lag type	Low coordination	Low-level coupling
Hunan	0.34	0.47	0.2	0.24	Synchronized model	Low coordination	Low-level coupling
Sichuan	0.46	0.38	0.21	0.25	Synchronized model	Low coordination	Low-level coupling