Table 2. Summary statistics for individual, and household, characteristic variables.

Variable	Descriptive	Symbol	Frequency	Percentage (%)
Individual characteristics
Gender	Male	1	609	61.76
	Female	0	377	38.24
Age group	Young (12–29)	2	478	48.48
	Middle-aged (30–49)	1	369	37.42
	Older (50–70)	0	139	14.10
Education level	Junior middle school lower	3	42	4.26
	High school and junior middle school	2	276	27.99
	Junior college or undergraduate	1	659	66.84
	Postgraduate and higher	0	9	0.91
Occupation	Student	6	373	37.83
	Employee in enterprise/company	5	314	31.85
	Officer	4	87	8.82
	Self-employed	3	109	11.05
	Freelance	2	53	5.38
	Retired	1	19	1.93
	Others	0	31	3.14
Monthly income	> 5000 (RMB)	3	153	15.52
	3000–5000 (RMB)	2	267	27.08
	2000–3000 (RMB)	1	199	20.10
	< 2000 (RMB)	0	367	37.22
Household characteristics
Car in household	Yes	1	555	56.29
	No	0	431	43.71
Bicycle/e-bike in household	Yes	1	726	73.63
	No	0	260	26.37