Table 1. Descriptions of the respondents.
| Variables | Categories | Number(Percentage) |
|---|---|---|
| Gender | Male | 243(49.5%) |
| Female | 248 (50.5%) | |
| Age | 21–40 | 291(59.3%) |
| 41–60 | 138(28.1%) | |
| others | 62(12.6%) | |
| Education | Junior high school and below | 101(20.6%) |
| Senior high school | 90(18.3%) | |
| College or junior college | 283(57.6%) | |
| Graduate | 17(3.5%) | |
| Annual household income | 0-50000(RMB) | 233(47.5%) |
| 50001–100000 | 130(26.5%) | |
| Above 100000 | 128(26.0%) | |
| Career | Staff of government and institutions | 53(10.8%) |
| Other employed workers or self-employed entrepreneurs | 242(49.3%) | |
| Workers at NPP | 117(23.8%) | |
| Retired workers, housewife, students, the unemployed | 79(16.1%) |
Note: Original data of the variables can be found in S1 File.