I have finished an analysis model demo

  An analysis model of File Sharing Module,it is used as a demo to explore the feasibility of UML modeling in our entire project.

  This model has placed into Share Tab of our QQ Group.its name is:filesharing_analysis_model.rar

Do you have any idea about it?This is my first UML model,please correct my error by any chance.

  It is only an analysis model,the design model base on it has not been finished.

  The progressing of our project is slow,but I think it will become better inch by inch.