Correct

三更

/ sāngēng / 
Strokes

Definition

third of the five night watch periods 23:00-01:00 (old)/midnight/also pr. [sān jīn]

Example

As a Noun

midnight

1
Zhèngzhí
正值
sāngēng
三更
shíkè
时刻
  
。

It was just midnight.