First of all, write a letter to the sisters who will graduate from university in 2020 and enter the society smoothly. First of all, we should congratulate them. If they leave the university, they can also have a free space of their own and do what they want. We should also encourage them to be braver and more determined to move forward towards their dreams. No matter how difficult it is, we can actually choose a better way to realize our dreams. Secondly, we should tell them that the hardships of society are not what they think. Sometimes they need to recognize the interpersonal relationship in society, and communication will be more complicated. They are smoother and more complicated than the systems in universities.