Do I have to get language credit if I am already fluent in another language for college admissions?

Which classes have you taken so far at the college? Were you placed into first year for Chinese along with all the students who are true beginners, or were you placed into a higher level course based on your language proficiency? My advice would be to take at least one more semester of Chinese at that college. You want to be able to read and write Chinese well, not just speak it. That will open a lot more doors for you in life.