之一 is one of those grammar that really gives your Chinese some polish. Using with confidence makes your Chinese sound great! Learn how to use it properly in this article.
Structure
In order to express "one of the..." in Chinese, "之一" (zhī yī) can be used at the end of the sentence.
adjective+noun+之一
An important note to keep in mind is that 之一 can only follow a noun.
Examples
Tā shì wǒ de hǎo pénɡ you zhī yī .
她 是 我 的 好 朋友 之 一 。
她 是 我 的 好 朋友 之 一 。
She is one of my best friends.