Table 1. Statistical analysis of the sample (n=343)

Division		Frequency	%
Gender	Male	98	28.6
	Female	245	71.4
Age	<20	5	1.5
	20-29	225	65.6
	30-39	63	18.4
	40-49	36	10.5
	>50	14	4.1
Job	Student	112	32.7
	Office worker	118	34.4
	Public official	44	12.8
	Professional official	33	9.6
	Private business	36	10.5
Monthly income	<3,000 RMB	87	25.4
	3,000-5,000 RMB	79	23.0
	5,000-8,000 RMB	85	24.8
	8,000-10,000 RMB	47	13.7
	>10,000 RMB	45	13.1
Residence	Northeast area	48	14.0
	Ring Bohai area	57	16.6
	Yangtze River Delta	117	34.1
	Pearl River Delta	35	10.2
	Middle Yangtze River	36	10.5
	Southwest area	21	6.1
	Northwest area	14	4.1
	Overseas	15	4.4