All of my Asian friends have hair at least to their shoulders. So its normal to me for them to have longer hair.
Asian girls could look good with long curly hair. I don't see why they wouldnt? If the hairstyle suits her facial shape which it likely would because most people can have long hair and some type of curl...then I think it would be good for her. I have seen Asian girls with long straight hair before so why not curly?