Table 1. A summary of data resource.

Data type	Data sources	Website
The positive confirmed cases and deaths of COVID-19	China’s National Health Commission	http://www.nhc.gov.cn/xcs/yqtb/list_gzbd_3.shtml
	Provincial Health Commission of China	Web link can be found in China’s National Health Commission
Climatic factors (relative air humidity, average temperature and solar radiation intensity)	China Meteorological Administration	http://www.cma.gov.cn/
	Global Climate Dataset	http://www.worldclim.org/
Socio-economic determinants (GDP and population)	China’s National Statistical Yearbook	http://www.stats.gov.cn/tjsj/ndsj/
Spatial distance (DW and DLPC)	Baidu Map	https://map.baidu.com/@13531775.58,3466675.15,12z
City types	Soil Transaction Website of China	https://www.tuliu.com/read-81029.html

DW and DLPC are spatial distance of the target city to Wuhan city, and spatial distance between the target city and their local province capital city, respectively.