It is clear here that I just put some my view point of how to improve oral English that maybe useful to all of us.

First, find every chance to speak. If you have college English book, you could read test every day. Practice makes perfect. It is true. When I was in my twenties, I read English every morning for 10mins which improve my spoken English.

Second, find every chance speak to the foreign. In Shanghai , a lots of foreigner in the college, schools.  I used to talked to them.

Third, I think English is not everything. We shall improve our Chinese which is also very useful for English study.