Where did you get the studying tools ?
From school.
I bought them by myself.
I borrowed them.
Others.
Would you prefer to buy new expensive books or second-handed books?
New expensive books.
Second-handed books.
Would you like to buy seniors’ notes or guidance materials?
guidance notes
Senior’s notes.
How do you prefer to get those studying tools?
Face to face exchange.
Exchange in places in school like liabery .
Deliver by perfessional staff.
Others
How did you treat your used study tools
Sold it.(go to question 3)
Kept it.(go to question 2
Throw it.(go to question 2)
Lent it .(go to question2)
Would you like to sell or send your used study tools on a platform only for schoolmates?
Yes(go to question 4)
No, I want to keep or lend it. (go to question 5)
What kinds of problems did you meet when selling or sending your study tools?
Why do you like to sell or send them on an exchange platform only for schoolmates?
It’s safe.
I can make some money.
I love to share.
Others
Why do you only want to lend or keep it.
I treasure my study tools
It’s too complicate.
It will waste my time.
Others