Table 1. Comparison of lifespan indicators between North, South China and Tibetan Area (natural geographical units)^*.

Lifespan indicators		South China	North China	Tibetan Area
LEB	2010	77.31	78.21	71.12
UOI	2010	1.60	1.31	0.74
	2000	0.97	0.77	0.56
	1990	0.65	0.59	0.45
LI	2010	1.71	1.33	1.18
	2000	1.03	0.94	0.80
	1990	0.63	0.59	0.63
CH	2010	2.93	2.09	1.35
	2000	1.44	1.69	2.41
	1990	0.76	0.69	2.08
Number of counties		1697	1345	153

^*The north China and South China is divided by Qinling Mountain- Huaihe river.