No one can deny the fact that copyright has many advantages such as copyright gives creator of piece of fortune, copyright prevent people's work from being stolen and it encourages people to create more and more new things. However, it also has many disadvantages. Obviously copyright is the main reason that people don't want to share works, thus knowledge is becoming hard to spread. At the same time, in order to get a good education, people have to pay more money compare to several years ago. In my opinion, there should be a standard that can measure works and decide which works can apply copyright and if it is related to commercial, it should give a reasonable price to help people share the works such as online music.