Looking for a room closed with Leibniz-Institut fur Katalyse

My name is Hanjun AI, male, Chinese. I am 25 years old. I can speak Chinses, English and a little Deutsch and I will continue to learn Deutsch. I am a graduate student who will be pursuing a Ph.D. in Leibniz Institute for Catalysis at the University of Rostock for a period of three years. I am outgoing and friendly. I like sports, watching movies and making friends. I will go to Germany in September this year to start my course, so I want to rent a suitable room.
The rental period could be 2 to 36 months (depend on the quality of the room). The rent can be 200 to 400 Euro. I'll be very happy if the room is as close as possible to Leibniz Institute for Catalysis (Albert-Einstein-Str. 29a, 18059 Rostock). If I can rent the room, I can promise to abide by the terms of the agreement, and responsible for the safety and cleanness of the room.
Now I'm in China (i'll go to Deutschland in september) and I have some friends in Rostock, they can help me to look the room, talk with you and pay the rent and deposit. And if you have any questions or suitable room/hause, please contact me without hesitation.