Table 1.

Demographic information of samples (N = 724).

Demographics		Frequency	Percentage
Gender	Male	308	42.5
	female	416	57.5
Age	Below 20	90	12.4
	20–29	279	42.3
	30–39	231	31.9
	40–49	81	11.2
	50 and over	43	5.9
Education	Junior high school or below	40	5.5
	Senior high school or vocational school	197	27.2
	Junior college or university	365	50.4
	Master's degree or PHD	122	16.9
Income	Under 2000 RMB	16	2.2
	[2000, 4000) RMB	308	42.5
	[4000, 6000) RMB	249	34.4
	[6000, 8000) RMB	70	9.7
	Above 8000 RMB	81	11.2
Career background	Student	193	26.7
	Government staff Private organization staff	262	36.2
		112	15.5
	Factory worker/agricultural worker	54	7.5
	Businessmen	76	10.5
	Others	27	3.7
City	Heilongjiang	226	31.2
	Jilin	267	36.9
	Beijing	231	31.9
Total		724	100