Hello, I am a Chinese.And I am proud of my powerful motherland.My Chinese is very good.I can teach you to speak Chinese.I believe that with my help, your Chinese will be greatly improved.

Hello, I am a Chinese. And I am proud of my powerful motherland. My Chinese is excellent (better vocabulary construction). I can teach you to speak Chinese. I believe that with my help, your Chinese will be significantly improved. (better vocabulary construction)