Table 2.

Sample structure of formal experiment.

One class indicator	Two class indicators	Sample size	Percentage	One class indicator	Two class indicators	Sample size	Percentage
Gender	Male	158	48.36%	Education	Secondary school and below	115	37.58%
	Female	148	51.64%		College degree	97	31.70%
Region	Guilin	87	28.43%		Bachelor,	76	24.84%
	Nanning	72	23.52%		master’s, or doctorate	18	5.88%
	Yulin	69	22.54%	Occupation	Enterprise staff	65	21.24%
	Pingle	37	12.09%		Professional	58	18.95%
	Yangshuo	41	13.40%		Self-employed person	51	16.66%
Age	Under 22 years	77	25.16%		Civil service staff	13	4.25%
	23–40 years	102	33.33%		Student	27	8.82%
	41–59 years	99	32.35%		Farmer	78	25.49%
	Over 60 years	28	9.15%		Other	14	4.58%