Number + 点 + Number + 分
In Chinese, time expressions are built by stating the hour followed by the minutes and the word 分 (fēn), meaning 'minute.' For example, 七点四十分 means 'seven forty' or '7:40.' This structure is used for all clock times that include minutes.
我们约在下午两点三十分见面吧。
Wǒmen yuē zài xiàwǔ liǎng diǎn sānshí fēn jiànmiàn ba.
Let's meet at two thirty in the afternoon.
火车是早上九点十五分出发的。
Huǒchē shì zǎoshang jiǔ diǎn shíwǔ fēn chūfā de.
The train departed at nine fifteen in the morning.
她每天晚上十一点四十五分才睡觉。
Tā měitiān wǎnshang shíyī diǎn sìshíwǔ fēn cái shuìjiào.
She doesn't go to bed until eleven forty-five every night.