请查看官方网站获取更多信息。

Qǐng chákàn guānfāng wǎngzhàn huòqǔ gèng duō xìnxī.

Please check the official website for more information.

这是官方文件，请妥善保管。

Zhè shì guānfāng wénjiàn, qǐng tuǒshàn bǎoguǎn.

This is an official document, please keep it safe.

官方声明已经发布在报纸上。

Guānfāng shēngmíng yǐjīng fābù zài bàozhǐ shàng.

The official statement has been published in the newspaper.