11 pm-1 am (in the system of two-hour subdivisions used in former times)
Definitions (Wiktionary)
noun, literary
the hours of the rat (11:00pm to 1:00am)
Examples (Tatoeba—Mandarin-English)
Mandarin
我在选择妻子时犯了一个很大的错误
我在選擇妻子時犯了一個很大的錯誤
wǒ zài xuǎn zé qī zǐ shí fàn le yí gè hěn dà de cuò wù
I made a big mistake in choosing my wife.
Mandarin
刮胡子时，我把脸刮破了。
刮鬍子時，我把臉刮破了。
guā hú zi shí ， wǒ bǎ liǎn guā pò le 。
I cut myself shaving.
I cut myself while shaving.
Mandarin
过年吃饺子的习俗和中国古代的计时法有关：中国古代把每一天分为十二个时段，每天开始是子时，相当于晚上11点到凌晨1点。
過年吃餃子的習俗和中國古代的計時法有關：中國古代把每一天分為十二個時段，每天開始是子時，相當於晚上11點到凌晨1點。
guò nián chī jiǎo zi de xí sú hé zhōng guó gǔ dài de jì shí fǎ yǒu guān ： zhōng guó gǔ dài bǎ měi yī tiān fèn wèi shí èr gè shí duàn ， měi tiān kāi shǐ shì zǐ shí ， xiāng dāng yú wǎn shang 11 diǎn dào líng chén 1 diǎn 。
The custom of eating dumplings on New Year's Eve is related to an ancient Chinese method of measuring time; in ancient China, each day was divided into twelve sections: the beginning of each day was called 'first time', which corresponds to the period from 11pm to 1am.
Mandarin
当我还是个孩子时，他经常来看望我们。
當我還是個孩子時，他經常來看望我們。
dāng wǒ hái shi gè hái zi shí ， tā jīng cháng lái kàn wàng wǒ men 。
He would often come to see us when I was a child.
Mandarin
那跟当我是个孩子时所听到的是同样的故事。
那跟當我是個孩子時所聽到的是同樣的故事。
nà gēn dāng wǒ shì gè hái zi shí suǒ tīng dào de shì tóng yàng de gù shì 。
That's the same story as I heard when I was a child.