Gender
1 = Male
2 = Female

Only child
1 = Yes
2 = No

Home location
1 = City
2 = Town
3 = Countryside

Average monthly living expenses
1 = <500 yuan
2 = 501-1000 yuan
3 = 1001-1500 yuan
4 = 1501-2000 yuan
5 = >2001 yuan

Per capita monthly income of your family
1 = 1000 and below
2 = 1001-3000
3 = 3001-5000
4 = 5001 and above

I feel down-hearted and blue
1 = A little of the time
2 = Some of the time
3 = Good part of the time
4 = Most of the time

Learning content or professional drab
1 = Not Happened
2 = It happened, but it didn’t affect
3 = Mild effect
4 = Moderate effect
5 = Severe effect
6 = Extremely severe effect

I have my own learning methods and plans, and can put them into practice
1 = Completely inconsistent
2 = Incompatible
3 = Uncertain
4 = Consistent
5 = Completely consistent

Release through work study or some other activity
1 = Don't take
2 = Occasionally take
3 = Sometimes take
4 = Often take