At East China University of Science and Technology, students who finish their food in the dining hall can get a coupon when they return their tray . They can exchange coupons for small gifts, such as books, magazines, mobile phone covers and hand warmers. "It's been a big surprise," said Liang Zhaoyun, 19, a student in the university of Shanghai. "It makes us try our best to finish the food!" But some food in the dining hall is so poorly prepared that students are _ to finish it all. Some schools have paid some attention to it. "The dishes in our canteen are all right, generally speaking. We've tried our best to make it tasty. But of course it's difficult to make all the students love it." said Wang. Other universities also pay attention to the size of food. At Nanjing University, rice is divided into three different-sized bowls that students can choose from. "I like to try different dishes at each meal. So I had to throw away a lot of food because the bowls were too big. But now the dining hall offers small sizes. It's great because I can try different dishes at half price and don't waste so much food," said Fan Peng, a student from Nanjing University. But what if you really can't finish all your food? Some universities also provide a take-away service. If you can't finish all your food, you can get a box to take the leftovers home. Even if you feed the cat, it's not wasted. So you see, if we call on students not to waste food, schools should also improve the service and meal quality.
Who is being rewarded?
For doing what?
Where is this?
What do they get for finishing?
What do they do with it?
What do other schools do?
Why do they do this?
Can you take your food home?
What do you put the food in?
How many different sized bowls does the Nanjing school offer?
students
students who finish their food in the dining hall can get a coupon when they return their tray .
returning their trays
students who finish their food in the dining hall can get a coupon when they return their tray .
at East China University
At East China University of Science and Technology, students who finish their food in the dining hall can get a coupon when they return their tray . 
a coupon
udents who finish their food in the dining hall can get a coupon when they return their tray .
They can use them for small gifts like books, magazine, mobile phone covers and hand warmers
They can exchange coupons for small gifts, such as books, magazines, mobile phone covers and hand warmers
Pay attention to the size of food
Other universities also pay attention to the size of food.
so food isn't wasted
But now the dining hall offers small sizes. It's great because I can try different dishes at half price and don't waste so much food,"
yes
 If you can't finish all your food, you can get a box to take the leftovers home
a box
 If you can't finish all your food, you can get a box to take the leftovers home.
three
At Nanjing University, rice is divided into three different-sized bowls that students can choose from.