To write these letters in Chinese, you would use the pinyin system for romanizing Chinese characters:
* D would be written as D (pronounced as "dee" in pinyin)
* L would be written as L (pronounced as "el" in pinyin)
* N would be written as N (pronounced as "en" in pinyin)
However, if you are looking for Chinese words that start with these letters, there are many possibilities. For example:
* D could be the first letter of "dà" (大) which means "big" or "large".
* L could be the first letter of "liàng" (亮) which means "bright" or "shining".
* N could be the first letter of "nǐ" (你) which means "you".
Please clarify what you are trying to do with these letters, and I can give you a more specific answer.