Here are a few options for the WordPress post tag description, catering to different tones and levels of descriptiveness:

**Option 1: Concise & Functional**

* **Description:** 指雙方人員均有出席的活動或會議。 (Indicates an event or meeting where both parties are present.)

**Option 2: Slightly more context**

* **Description:** 用於標示參與活動雙方人員均親自到場的情況。 (Used to mark situations where both parties involved in an event are present in person.)

**Option 3: Emphasis on Agreement**

* **Description:** 表示雙方均已到場，可能暗示著協議或會談的開始，以及雙方意願參與的標誌。 (Indicates that both parties have arrived, potentially implying the start of an agreement or discussion, showcasing a willingness to participate.)

**Option 4: Simple & Inclusive:**

* **Description:** 參與活動的雙方人員均到齊。 (Both parties involved in the activity are present.)

**Key Considerations when Choosing:**

* **Your Blog’s Tone:** Choose the description that best fits the overall voice of your website.
* **Intended Audience:** Consider how familiar your audience is with the situation. More general descriptions may be better if targeting a broad audience.
* **Purpose:** Will you use this tag only to categorize posts about straightforward attendance, or are you using it to highlight more complex situations?
* **SEO :** Make sure the description uses the key word “雙方到場” but is also written in a clear understandable sentence.

I recommend picking the description you feel best suits the overall tone and context of your blog posts. You can always adjust it later if needed.