Creative Commons (CC) is the digital works on the network (literature, art, music and so on) authorization mechanism, it is committed to making any creative works have the chance to be more people to share and createknowledge, and jointly promote the mankind works produced the greatest value in its life cycle.

　　You are free:

·to copy, distribute, display, and perform the work

·to make derivative works

Under the following conditions:

 Attribution.

 Noncommercial.

 Share Alike.