Here are a few options for a WordPress post tag description, depending on the nuance you want to convey, using “公式” (Gōngshì – Official) in Traditional Chinese:

**Option 1: Straightforward and Concise**

* **Description:** 官方資訊，正式宣告。 (Guānfāng zīxùn, zhèngshì xuāngào.) – Official information, formal announcement.
* **Keywords (optional):** 官方, 正式, 發布, 聲明 (Guānfāng, zhèngshì, fābù, shēngmíng) – Official, formal, release, statement.

**Option 2: Emphasizing Authenticity**

* **Description:** 從官方來源發布的真實資訊，可信度最高。 (Cóng guānfāng láiyuán fābù de zhēnshí zīxùn, kěxìn dù zuìgāo.) – Authentic information released from official sources, with the highest credibility.
* **Keywords (optional):** 真實, 可信, 官方, 來源 (Zhēnshí, kěxìn, guānfāng, láiyuán) – Authentic, credible, official, source.

**Option 3: Highlighting Authority**

* **Description:** 代表官方機構的聲明和資訊，權威可靠。 (Dàibiǎo guānfāng jīgòu de shēngmíng hé zīxùn, quánwēi kěkào.) – Representing the statements and information of official institutions, authoritative and reliable.
* **Keywords (optional):** 權威, 官方, 机构, 情報 (Quánwēi, guānfāng, jīgòu, qíngbào) – Authoritative, official, institution, information.

**Option 4: More general and versatile**

* **Description:** 所有來自官方渠道的資訊，包括聲明、公告和更新。 (Suǒyǒu láizì guānfāng qúdào de zīxùn, bāokuò shēngmíng, gōnggào hé gēngxīn.) – All information from official channels, including statements, announcements, and updates.
* **Keywords (optional):** 官方, 資訊, 公告, 更新 (Guānfāng, zīxùn, gōnggào, gēngxīn) – Official, information, announcement, update.

**Choosing the best option depends on the content of your blog posts.** If you frequently publish press releases or official statements, **Option 1** or **Option 3** would be good. If you want to emphasize the reliability of the information, choose **Option 2**. If the tag is used for a wider range of information- including announcements and updates, then **Option 4** is probably the best approach. Remember to also add some relevant keywords to make your tags more discoverable.