Table 1.

The origin and quantity of different tobacco samples.

Origins of tobacco samples (country/province)		Category tag	Number of training set samples	Number of test set samples
China	Yunnan	C 1	320	80
	Guizhou	C 2	320	80
	Fujian	C 3	320	80
	Jiangxi	C 4	320	80
	Hunan	C 5	320	80
	Sichuan	C 6	320	80
	Chongqing	C 7	320	80
	Henan	C 8	320	80
	Shandong	C 9	320	80
	Jilin	C 10	320	80
	Brazil	C 11	320	80
	Zimbabwe	C 12	320	80
	America	C 13	320	80