Here are a few options for a WordPress post_tag description, ranging from concise to slightly more descriptive, all in Traditional Chinese:

**Option 1 (Concise):**

> 一百人民幣 (一百元人民幣) – 中國官方貨幣的一種。

(Translation: One hundred Renminbi (one hundred Yuan Renminbi) – A form of Chinese official currency.)

**Option 2 (Slightly More Descriptive):**

> 100人民幣 – 包含與人民幣面額、使用場合，以及兌換匯率相關的文章主題。

(Translation: 100 Renminbi – Includes article topics related to the Renminbi denomination, usage scenarios, and exchange rates.)

**Option 3 (Focus on Content Purpose):**

> 深入了解100人民幣: 探索人民幣的價值、使用地點，以及如何兌換和其他實用資訊。

(Translation: Delve into 100 Renminbi: Explore the value of Renminbi, where it’s used, how to exchange it and other practical information.)

**Option 4 (For a Specific Blog):**

> 本站關於100人民幣的文章 – 包括人民幣的紙幣設計、流通、以及在中國境內和境外的使用。

(Translation: Articles on this site about 100 Renminbi – Including the design, circulation and usage of Renminbi within China and abroad.)

**Which option to choose depends on:**

* **The context of your website and the type of articles you write:** Are they focused on finance, travel, or general information?
* **The overall tone of your blog:** Is it formal, informal, or somewhere in between?
* **The level of detail you want in your description.**

Choose the description that best reflects the content you’re tagging and your overall blogging strategy. Remember to use proper punctuation and clarity in your Chinese.