我常自我介绍的时候，用这样介绍:- 「こんにちは、わたしはクリスと申します」　－ 这「と申します」是尊敬語的。 I can see that you can speak English, so will continue in English, as my Chinese is still very bad! Usually you would say 中国出身です。22歳です。よろしくお願いします。Or something to that effect.　 As long as you use ～です　and ～ます you should be fine. Using “简体” or “常体” like “私はクリスと言う” might be considered rude. Eomer.