Here are a few options for a WordPress post_tag description, keeping in mind that a tag description should ideally be concise and informative:

**Option 1 (Short & Sweet):**

> 查詢最新的**門號價格**資訊，包括手機資費、方案優惠以及相關費用。

* **Translation:** Find the latest information on **mobile number prices**, including mobile service plans, promotional offers, and related fees.
* **Focus:** Primarily focused on price information.

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

> 了解不同電信公司與手機品牌的 **門號價格**。 我們提供最新的資費比較，讓您輕鬆選擇最划算的方案，涵蓋月租費、通話費、網路流量等相關細節。

* **Translation:** Learn about the **mobile number prices** from different telecommunications companies and mobile phone brands. We provide the latest plan comparisons, allowing you to easily choose the most cost-effective plan, covering monthly fees, call charges, data allowance, and other relevant details.
* **Focus:** Includes comparison shopping elements.

**Option 3 (General & Broader):**

> 涵蓋各家電信業者的 **門號價格**、資費方案、以及相關優惠活動。 想找到最適合您的手機門號嗎？這裡提供您完整的資訊與比較。

* **Translation:** Covers the **mobile number prices**, service plans, and related promotional activities of various telecommunications operators. Looking to find the mobile number that’s right for you? Here you’ll find complete information and comparisons.
* **Focus:** More promotional and focused on helping users find a plan.

**Which to Choose:**

* Choose the option that best reflects the content of the posts tagged with “門號價格”. Do the posts primarily focus on pricing, offer comparisons, or discuss promotions?
* Keep it concise — WordPress provides limited space. Consider the character limit.
* Use keywords relevant to your audience’s online search habits.
* Make it clear and easy to understand for a user.

To add this description in WordPress, follow these steps:

1. **Go to your WordPress admin dashboard.**
2. **Navigate to Posts -> Tags.**
3. **Find the “門號價格” tag.**
4. **Click “Edit”.**
5. **In the “Description” field,”** copy and paste the description you are satisfied with.
6. **Click “Update”.**

Good luck!