关于 + Topic + 的 + Noun
The preposition 关于 (guānyú) means 'concerning,' 'regarding,' or 'about.' It introduces the topic or subject matter of a discussion, book, or piece of information. It is placed before the noun phrase that identifies the topic.
关于这个问题,我们下次再讨论吧。
guānyú zhège wèntí, wǒmen xià cì zài tǎolùn ba.
Let's discuss this question again next time.
你看过关于中国历史的那部纪录片吗?
nǐ kàn guo guānyú zhōngguó lìshǐ de nà bù jìlùpiàn ma?
Have you seen that documentary about Chinese history?
关于明天的安排,经理已经发了邮件。
guānyú míngtiān de ānpái, jīnglǐ yǐjīng fā le yóujiàn.
Regarding tomorrow's arrangements, the manager has already sent an email.