Here are a few options for a WordPress post_tag description for “萬年大樓” (Wannian Building), depending on the desired level of detail and target audience:

**Option 1: Concise & Informative**

* **Description:** 台北西門町的地標性商場，以潮流服飾、3C產品聞名。 (A landmark shopping mall in Ximending, Taipei, known for trendy clothing and electronics.)

**Option 2: Slightly More Detailed**

* **Description:** 位於台北西門町，萬年大樓是台北的早期購物中心之一，至今仍是年輕人聚集地，販售服飾、玩具、漫畫、電玩等商品，也見證了西門町的發展。 (Located in Ximending, Taipei, Wannian Building is one of Taipei’s early shopping malls, still a gathering place for young people today, selling clothing, toys, comics, video games, and more, and witnessing the development of Ximending.)

**Option 3: Focusing on Nostalgia (If applicable)**

* **Description:** 萬年大樓，西門町的時代記憶。 匯集潮流、娛樂和文化，承載著無數人的青春回憶，至今仍是重要的時尚指標。 (Wannian Building, a memory of the times in Ximending. It gathers trend, entertainment and culture, carrying the youth memories of countless people, and is still an important fashion indicator.)

**Option 4: Focusing on current relevance**

* **Description:** 台北萬年大樓聚集了西門町的年輕人趨勢，提供各式各樣的服飾、3C產品、玩具等，是潮流愛好者必訪之地。 (Taipei’s Wannian Building gathers young people’s trends from Ximending providing various clothing, 3C products, toys, etc. It is a must-visit destination for fashion enthusiasts.)

**Key Considerations When Choosing:**

* **Target Audience:** Who are you writing for? Are they locals, tourists, people interested in retro culture, etc.?
* **Post Content:** What is the overall theme of your blog? Does this post emphasize history, fashion, or something else?
* **Keyword Density:** While it’s not critical for tags, ensure the description includes relevant keywords like “西門町,” “購物中心,” “潮流,” etc., to aid search engine optimization.
* **Character Limit:** WordPress might have character limits for tag descriptions, so keep it concise if needed.

**How to use these in WordPress:**

1. **Go to your WordPress Dashboard > Posts/Tags/Categories**
2. **Click on “Tags”** (You might need to click edit on the already created tag “萬年大樓”)
3. **To edit existing or click on edit for “萬年大樓”**: In the Tag Info section, you’ll find a field labelled “Description.”
4. **Paste or type** your chosen description into the “Description” field.
5. **Click “Update”** (or “Create Tag” if it’s a new tag).

Choose the description that best suits your needs!