How to say "how so?" In chinese I asked a friend who recently moved to america "跟中国的相比，这里的学校生活有很大的不同吗” and he replied "很不一样的”. I want to now ask "how so?" As in how are the two different, But i dont know how to say this in chinese. What is a short way to ask someone to elaborate on a topic such as "how so?"