Here are a few options for the “案件” (Ānjiàn, meaning “case” or “project”) WordPress post tag description, catering to different levels of detail and user understanding:

**Option 1: Concise & Informative**

* **傳統中文:** 關於本站內所有案件，包括正在進行中和已完成的項目。
* **English Translation:** All cases/projects on this website, including ongoing and completed ones.
* **Explanation:** This is short, sweet, and directly explains the purpose of the tag in a single sentence.

**Option 2: Slightly more detailed**

* **傳統中文:** 標記與不同案件相關的文章、頁面或內容。涵蓋各種專案，從設計到開發，以及我們參與的客戶與合作。
* **English Translation:** This tag marks posts, pages, and content related to our various projects. It covers various projects, from design to development, and includes the clients and partners we’ve worked with.
* **Explanation:** This offers a bit more context, highlighting the scope of the projects and who’s involved.

**Option 3: Focus on user engagement**

* **傳統中文:** 探索我們所有的案件！在這裡您可以了解我們如何解決問題、建立客戶關係，以及我們的成功案例。也欢迎您浏览与您类似的案件，看看我们是否也能帮助您！
* **English Translation:** Explore all our projects! Here you can learn how we solve problems, build client relationships, and our success stories. We welcome you to browse similar projects and see if we can help you too!
* **Explanation:** This focuses on the benefits for the user, making it more engaging and encouraging them to browse the tagged content.

**Option 4: A more business-oriented approach**

* **傳統中文:** 我們的「案件」標籤彙集了我們完整的作品集案例，詳述我們如何協助客戶實現願景，以及我們在不同領域的專業知識。
* **English Translation:** Our “Projects” tag gathers our complete portfolio of case studies, detailing how we help clients achieve their vision and our expertise in different fields.
* **Explanation:** This is a more professional description suitable for businesses to highlight their accomplishments and area of expertise.

**To Choose the Best Option:**

* **Target Audience:** Consider who will be reading your content. Is it clients, potential partners, or a general audience?
* **Website Style:** Does your website have a formal or informal tone?
* **Content Scope:** Think about the types of projects you showcase.
* **SEO:** Make sure the description includes relevant keywords, not only “案件” but other related ones like “設計,” “開發,” or your business’s specific areas.

I recommend starting with Option 1 and adjusting it based on your needs and website’s context. Remember to also consider using the “案例” (àn lì, meaning “case study” or “example”) or “项目” (“xiàng mù,” meaning “project”) as tags – depending again on the kind of website and user.