Table 11: Portfolio efficiency in seven regions.

Area	TE	PTE	SE
North China	0.580	0.617	0.939
Northeast China	0.895	1	0.895
East China	0.686	0.748	0.917
Central China	0.644	0.701	0.919
Northwest	0.672	0.746	0.901
South China	1	1	1
whole country	0.832	0.922	0.902