Table 1.

Basic information on Shenzhen and Hefei

City	Shenzhen	Hefei
Permanent population	10.77 million	7.96 million
Geographical zone	Subtropical	Temperate
Latitude	22° 32′ N	31° 86′ N
Average temperature in January
Min	20 °C	8 °C
Max	13 °C	0 °C