Intensive Mandarin course in Xian wanted

Can anyone recommend a school or course for intensive learning mandarin in the city?
Ï plan to spend a month or 2 at most studying mandarin. I need a conversation course. I am a totally beginner. I would like to find a place where I can learn and practice by speaking. I really need to learn to speak. I am planning either december or january. I don't need a dorm or place to stay as I have it. The course should focus on listening, repeating and speaking. At least 4 hours everyday. Not private tuition as I believe that a classroom with around 6 students is the best environment to learn.
Thank you