Here are a few options for a description for the WordPress post_tag “國外線” (Guo Wai Xian, meaning “Overseas Lines” or “International Routes”) in Traditional Chinese, depending on the intended use and audience:

**Option 1: Concise and General**

* **Description:** 探索世界各地的旅遊路線及國際航線。 (Tànsuǒ shìjiè gèdì de lǚyóu lùxiàn jí guójì hángxiàn.)
* **Translation:** Explore travel routes and international lines around the world.

**Option 2: More Descriptive, for Travel Blog**

* **Description:** 此標籤涵蓋所有往返海外的目的地，包括機票、酒店、當地交通，以及各種獨家旅遊體驗和建議，讓您輕鬆規劃您的國外旅程。 (Cǐ biāojiān hánggài suǒyǒu wǎngfǎn hǎiwài de mùdìdì, bāokuò jīpiào, jiǔdiàn, dāngdì jiāotōng, yǐjí gèzhǒng dújiā lǚyóu tǐyàn hé jiànyì, ràng nín qīngsōng guīhuà nín de guówài lǚchéng.)
* **Translation:** This tag covers all destinations to and from overseas, including air tickets, hotels, local transportation, and various exclusive travel experiences and recommendations, allowing you to easily plan your overseas trip.

**Option 3: Focus on Content (If you offer specific information)**

* **Description:** 關於國外旅遊、國際航班、簽證資訊、旅遊攻略、各國文化介紹等等，都在這裡！ (Guānyú guówài lǚyóu, guójì hángbān, qiānzhèng zīxùn, lǚyóu gōnglüè, gèguó wénhuà jièshào děngděng, dōu zài zhèlǐ!)
* **Translation:** Everything about overseas travel, international flights, visa information, travel guides, introductions to different countries’ cultures, and more, is here!

**Option 4: Short & Simple (For a quick reference)**

* **Description:** 國外旅遊相關內容。 (Guówài lǚyóu xiāngguān nèiróng.)
* **Translation:** Content related to overseas travel.

**Important Considerations When Choosing:**

* **Your Website’s Topic:** Is it a travel blog, a news site, an airline’s website?
* **Target Audience:** Who are you trying to reach? (Are they looking for budget travel tips, luxury travel advice, detailed itinerary planning, etc.?)
* **Content Type:** What kind of content will you be tagging with this? (Articles, videos, photos, etc.)
* **SEO:** Consider adding relevant keywords related to overseas travel within the description to improve search engine optimization. (Like 旅行, 航班, 機票, 簽證 etc.)
* **Character Limit:** WordPress may have a character limit for tag descriptions, so choose an option that fits.

**How to add the description in WordPress:**

1. **Go to your WordPress dashboard.**
2. **Navigate to Posts -> Tags (or Categories if you’re using this for categories).**
3. **Edit the “國外線” tag.**
4. **Look for a “Description” field.** (If you don’t see it, you might need to enable it in the “Screen Options” at the top of the page.)
5. **Paste or type your chosen description.**
6. **Click “Update” to save.**

I recommend choosing the description that best aligns with your website’s content and goals. Good luck!