Here are a few options for the WordPress post_tag description, with varying levels of detail and SEO focus, all in Traditional Chinese:

**Option 1 (Concise and General):**

> 中信金股價相關資訊，包含股價走勢、營收公告與未來展望。

**(Translation):** Information related to Cathay Financial Holding stock price, including price trends, revenue announcements, and future prospects.

**Option 2 (More Descriptive and SEO-Friendly):**

> 查詢與分析中信金 (2823) 股價表現、股息政策、財務報告。了解最新的中信金股價預測、內外資持股變動，以及投資建議。

**(Translation):** Search and analyze Cathay Financial Holding (2823) stock price performance, dividend policy, and financial reports. Stay informed about the latest Cathay Financial Holding price forecasts, changes in domestic and foreign investor holdings, and investment recommendations.

**Option 3 (Focus on News and Updates):**

> 追蹤中信金股價新聞、即時股價更新、分析報告。掌握中信金最新營運狀況，以及影響股價波動的重要事件。

**(Translation):** Track Cathay Financial Holding stock price news, real-time price updates, and analysis reports. Stay up-to-date on the financial performance of Cathay Financial Holding and important events impacting stock price fluctuations.

**Option 4 (Investor-Focused):**

> 為投資人提供中信金股價走勢圖、技術分析、基本面分析，幫助您做出更明智的投資決策。提供完整的股價數據，助您評估中信金的投資價值。

**(Translation):** Provides investors with Cathay Financial Holding stock price charts, technical analysis, and fundamental analysis to help you make more informed investment decisions. Offers complete stock price data to help you assess the investment value of Cathay Financial Holding.

**Key considerations when choosing:**

* **Relevance:** Make sure the description accurately reflects the content associated with that tag.
* **Keyword Usage:** Include relevant keywords like “中信金 (2823)” (Cathay Financial Holding’s stock code), “股價 (Stock Price),” “營收 (Revenue),” “分析 (Analysis),” etc. This helps with SEO.
* **Target Audience:** Consider who the target audience is. Is it general readers, investors, or financial professionals? Tailor the language accordingly.
* **Length:** Keep it concise enough to be easily readable but detailed enough to be informative. Most WordPress theme will show the description.

I would recommend choosing option 2, as it is informative, SEO focused, and provides a good overview of the content related to the tag. Remember to choose one that best suits your WordPress website’s content and your goal.