至于 (zhìyú) "with regards to" or "as to" is used when the speaker want to comment on a topic related to the previously discussed one.

Bisic Structure

This structure is simple, used similarly to "with regards to" in English. Just put in before the further comment you want to say.

至于 + Topic, Comment

Examples

Wǒ yǐjīnɡ jìnlì le, zhìyú jiéɡuǒ zhǐ nénɡ kàn yùnqi le.
我 已经 尽力 了，至于 结果 只 能 看 运气 了。
I've already tried my best. With regards to the results, it's all a matter of luck.

Tā ɡēn wǒ shuō mínɡtiān huílá, zhìyú jùtǐ de shíjiān, wǒ jiù bú zhīdào le.
她 跟 我 说 明天 回来，至于 具体 的 时间，我 就 不 知道 了。
She told me she was coming back tomorrow. In regards to a specific time, I don't know.

Lǜshī zhǐnénɡ wéitā de kèhù biànhù, zhìyú zuìhòu de pànjué, nà jiù qǔjuéyú fǎɡuān le.
律师 只能 为他 的 客户 辩护，至于 最后 的 判决，那 就 取决于 法官 了。
A lawyer only defends his client. As for the verdict, that depends on the judge.