Here are a few options for the WordPress post tag description “investment cost” in Traditional Chinese, ranging in formality and emphasis:

**Option 1 (Simple & Direct):**

* **Description:** 投資成本 (Tóu zi chéng běn) – 與投資相關的費用，包括購買資產的價格、手續費等。
* **Translation:** (Investment Cost) – Expenses related to investment, including the price of assets, fees, etc.
* **Explanation:** This is a straightforward and clear definition. It directly relays the meaning in a concise way, suitable for general use.

**Option 2 (More Detailed):**

* **Description:** 投資成本 (Tóu zi chéng běn) – 涉及投資活動的總費用，涵蓋資產採購價格、交易手續費、稅金、以及其他相關支出，影響投資的總回報。
* **Translation:** (Investment Cost) – The total expenses involved in investment activities, covering the acquisition price of assets, transaction fees, taxes, and other related expenses, impacting the overall return on investment.
* **Explanation:** This option provides a more complete explanation, highlighting the various components that make up investment cost and its influence on returns.

**Option 3 (Emphasis on Key Points):**

* **Description:** 投資成本 (Tóu zi chéng běn) – 關鍵的投資指標，包括採購價格和交易費用，影響您的投資收益。
* **Translation:** (Investment Cost) – A key investment indicator, including purchase price and transaction fees, influencing your investment returns.
* **Explanation:** This emphasizes that “investment cost” is a vital factor and includes information about its impact on return.

**Option 4 (For a specific niche – e.g., Real Estate):**

* **Description:** 投資成本 (Tóu zi chéng běn) – 房地產投資總額，包含買入價、稅費、律師費、中介佣金等，是評估投資回報的重要依據。
* **Translation:** (Investment Cost) – Total amount for real estate investment, including purchase price, taxes, legal fees, and broker commissions, serving as a crucial basis for evaluating investment returns.
* **Explanation:** This option is a good choice if the topic is particularly related to Real Estate or similar field.

**To choose the best option, consider:**

* **Your Target Audience:** Who are you writing for? Are they beginners or experienced investors?
* **The Context of the Post:** What is the post about? Is it a general overview, or a deep dive into a specific investment type?
* **SEO Considerations:** While the description doesn’t directly affect SEO, a keyword-rich and clear description can improve your internal linking and overall understanding of your site’s content.

**How to Add the Description in WordPress:**

1. **Go to Posts > Tags** (in your WordPress dashboard).
2. **Locate the tag “investment cost”.**
3. **In the box that says “Description” or “Tag Description”, paste your chosen Chinese description.**
4. **Click “Update” or “Save”.**

I recommend using **Option 1 or 2** as a general starting point. Good luck!