I am a chinese boy.这个 chinese boy前面要加a吗?

I am a chinese boy.这个 chinese boy前面要加a吗? I am not Chinese boy I am not a Chinese 为什么后者要加a那 I am a chinese boy .(变复数） a chinese boy翻译 I am a Chinese boy.My name is Li Fei.I am a student.My fathe I ____ a chinese boy .I'm thirteen years old .now i am __ a I am a good boy.I can speak English and a little Chinese 阅读理解。 　　I am a Chinese boy. My name is Li Ming. I’m a studen I am a Chinese boy. My name is Li Ming.I’m a student. In my 1.I am a chinese boy __live with __parents.2._(we)buy a pres I’m a Chinese boy. My name is Zhao Ming. I am in No. 34 Midd I am Chinese boy.chinese为什么不能用china代替