I am a fresh graduate of xxxxxx, majoring in xxxx of BBA. Apart from taking business subjects, I also studied about China business characteristics in the courses. I am fluent in Mandarin and proficient in using various computer software to handle documents.
I am a fresh graduate from.........(I think you will add the name of the university and therefore I prefer the word from), major in is better majoring.
various computer softwares
to handle documents (I don't think you need to add this phrase)