Correct

守口如瓶

/ shǒu kǒu rú píng / 
Strokes

Definition

lit. to guard one's mouth like a closed bottle (idiom); tight-lipped/reticent/not breathing a word

Example

Definition

keep the mouth shut like a bottle; keep one's mouth tightly shut; be close-mouthed; be tight-mouthed; be tight-lipped; breathe not a single word; seal one's lips

1
Tā
他
yào
要
wǒmen
我们
shǒukǒurúpíng
守口如瓶
  
。

He asked us to keep our mouths shut.

2
Tā
他
duì
对
cǐ
此
shǒukǒurúpíng
守口如瓶
  
。

He kept a tight lip about this.

3
Duì
对
zìjǐ
自己
de
的
shì
事
shǒukǒurúpíng
守口如瓶

be close about one's own affairs