international conference this holiday will be a great holiday, i'm joining an organizing committee of international conference on mathematics. this is my first time on international event. i will meet many mathematician from all around the world, make a new friend, and also by this event i learn about teamwork with my friends and my lecturer, learn how to manage a big event, learn how to be professional. Maybe today i'm just being an organizing committee, but i wish someday i'll do more. thank you for your correction.