Correct

两面三刀

/ liǎng miàn sān dāo / 
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/两面三刀-Chinese-idioms-Cchatty-3f3ee6d0-f493-452b-8427-897293b8aa4a-1612776297.jpg

Collocation

1
两面三刀的做法
2
是个两面三刀的人
3
玩两面三刀

Definition

两面三刀

Literally means:

two sides and three knives

Actually means:

play a double game; double-dealing; double-faced

It refers to playing a double game. It usually refers to cheating others in different ways. Derogatory.

指玩两面派的做法,表面一种做法,而实际上又是另一种做法。多指用各种手法欺骗别人。具有贬义色彩。

Example

Often used as predicate or attributive. (作谓语、定语)
1
Zhège
这个
rén
人
zuǐ
嘴
tiánxīn
甜心
dú
毒
  
,
liǎngmiànsāndāo
两面三刀
  
,
nǐmen
你们
duì
对
tā
他
kě
可
yào
要
tígāo
提高
jǐngtì
警惕
  
。

This man has a sweetheart, three knives on both sides, and you have to be vigilant about him.

2
Zhèzhǒng
这种
liǎngmiànsāndāo
两面三刀
de
的
rén
人
  
,
juéduì
绝对
bù
不
néng
能
xiāngxìn
相信
  
。

Such two-sided, three-knife people can never be believed.

3
Huìshàng
会上
  
,
dàjiā
大家
jiēlù
揭露
le
了
tā
他
nàxiē
那些
liǎngmiànsāndāo
两面三刀
de
的
zuòfǎ
做法
  
,
bìng
并
duì
对
tā
他
tíchū
提出
yánsù
严肃
de
的
pīpíng
批评
  
。

At the meeting, he was exposed for his two-sided, three-knife approach and made serious criticisms of him.