Garbage cans of five colors, red, yellow, blue, green and grey, occurred recently in Ningbo University. It is said that they are used to collect garbage of different kinds.

　　The idea was put forward by Guo Huiying, a teacher who is now working in logistics department of Ningbo University.

　　Students were not so accustomed to using color garbages at first. Some students just threw their garbage as before and some even put their garbage outside garbages. Guo helped to collect these garbage into color gabage cans, which moved students deeply. Now students have fully accustomed to using color garbage cans and campus has also become cleaner and cleaner.