Table 1.

The socio-demographic characteristics of the sample.

Description of Variable	N (%)
Gender female male	812(45%) 993(55%)
Age born in/after 2000 (at least 18 years old) born in 1990s born in 1980s born in 1970s born in 1960s born in 1950s or earlier	7(0.4%) 557(30.9%) 839(46.5%) 288(16.0%) 111(6.1%) 3(0.2%)
Level of education junior high school graduate or below senior high school graduate college degree bachelor's degree Master's degree PhD.	11(0.6%) 79(4.4%) 298(16.5%) 1050(58.2%) 279(15.5%) 88(4.9%)
Income
[How much on average did you earn monthly last year (CNY)?]
< = 999 1,000–2,999 3,000–4,999 5,000–9,999 10,000–19,999 20,000–49,9999 50,000–99,999 > 100,000	4(0.2%) 46(2.5%) 283(15.7%) 797(44.2%) 472(26.1%) 116(6.4%) 50(2.8%) 37(2.0%)