Who is being rewarded?
students
For doing what?
returning their trays
Where is this?
at East China University
What do they get for finishing?
a coupon
What do they do with it?
They can use them for small gifts like books, magazine, mobile phone covers and hand warmers
What do other schools do?
Pay attention to the size of food
Why do they do this?
so food isn't wasted
Can you take your food home?
yes
What do you put the food in?
a box
How many different sized bowls does the Nanjing school offer?
three