Here are a few options for the description of the WordPress post tag “部首” (Bùshǒu – Radicals) in Traditional Chinese, ranging from brief to more detailed:

**Option 1: Concise & Direct**

> 部首：漢字構成的基本元素，用以分類和查字典。 (Bùshǒu: Hànzì gòuchéng de jīběn yuánsù, yòng yǐ fēnlèi hé chá zìdiǎn.)
>
> *Translation: Radicals: The basic elements of Chinese character composition, used for classification and looking up words in a dictionary.*

**Option 2: Slightly More Descriptive**

> 部首： 認識漢字的重要關鍵。本標籤下的文章探討每個漢字的部首，以及它們的含義、用法，對於學習中文大有幫助。 (Bùshǒu: rènshí Hànzì de zhòngyào guānjiàn. Běn biāoqiān xià de wénzhāng tàntǎo měi gè Hànzì de bùshǒu, yǐjí tāmen de hányì, yòngfǎ, duìyú xuéxí Zhōngwén dà yǒu bāngzhù.)
>
> *Translation: Radicals: A crucial key to understanding Chinese characters. Articles under this tag explore the radicals of each Chinese character and their meanings and usage, which greatly assists in learning Chinese.*

**Option 3: Focusing on Practical Application**

> 部首： 學習中文必備的工具。此標籤下的文章提供部首的教學、例字，以及如何運用部首來查字典、理解字義，幫助你紮實掌握漢字。 (Bùshǒu: xuéxí Zhōngwén bìbèi de gōngjù. Cǐ biāoqiān xià de wénzhāng tígōng bùshǒu de jiàoxué, lìzì, yǐjí rúhé yùnyòng bùshǒu lái chá zìdiǎn, lǐjiě zìyì, bāngzhù nǐ zhāshí zhǎngwò Hànzì.)
>
> *Translation: Radicals: An essential tool for learning Chinese. Articles under this tag provide radical lessons, example characters, and how to use radicals to look up words in dictionaries and understand character meanings, helping you firmly grasp Chinese characters.*

**Option 4: Broad and Informative**

> 部首： 漢字的基石，是漢字分類、學習和理解的核心。 這裡收錄了關於各種常用部首的介紹、演變、以及它們在漢字中的作用和意義。 無論是初學者還是進階學習者，都能從中受益。 (Bùshǒu: Hànzì de jīshí, shì Hànzì fēnlèi, xuéxí hé lǐjiě de héxīn. Zhèlǐ shōulù le guānyú gèzhǒng chángyòng bùshǒu de jièshào, yǎnbiàn, yǐjí tāmen zài Hànzì zhōng de zuòyòng hé yìyì. Wúlùn shì chūxuézhě háishì jìnjiē xuéxízhĕ, dōu néng cóng zhōng shòuyì.)
>
> *Translation: Radicals: The cornerstone of Chinese characters, central to their classification, learning, and understanding. This category contains introductions, evolution, and the roles and meanings of various commonly used radicals. Both beginners and advanced learners can benefit from this.*

**Key things to consider when choosing:**

* **Target Audience:** Who are you writing for? Beginner learners, intermediate learners, or a general audience interested in Chinese?
* **Content of Your Posts:** Does your content focus on practical dictionary skills, historical evolution, or general character knowledge?
* **Conciseness and Clarity:** The description should be easy to understand and accurately reflect the topic.
* **Use of the Traditional Chinese Script:** Make sure everything is written in Traditional Chinese.

Choose the description that best suits your blog’s overall style and the specific content you plan to include under this tag. I would recommend Option 2 or 3 for blogs aimed at Chinese learners. Good luck!