I am Chinese.Chinese的词性

I am Chinese.Chinese的词性 i am not chinese i am nativer chinese i am chinese.where_from? I am a Chinese. I am a chinese还是I am chinese正确 是i am a chinese 还是 i am chinese I am a Chinese还是I am Chinese I am a Chinese和I am Chinese哪个对? I am Chinese.I am a Chinese.哪个句子正确 I am good at Chinese. I am Chinese .nom student .