Correct

杀人不见血

/ shā rén bú jiàn xuè /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/杀人不见血-Chinese-idioms-Cchatty-2653a8b2-55bc-46ef-b4eb-70cf792c6079-1612777509.jpg

Collocation

1
真是杀人不见血
2
杀人不见血的恶魔
3
一把杀人不见血的刀
4
毒品是杀人不见血的
5
这家伙杀人不见血

Definition

杀人不见血

Literally means:

kill without spilling blood

Actually means:

It means killing by subtle means without leaving any sign. It may also mean harming a person by underhand means. Derogatory.

指害人的手段阴险而隐蔽,不留下任何痕迹。也指不动声色地坑害人,具有贬义色彩。

Example

Often used as predicate, attributive or object. (作谓语、定语、宾语)
1
Zhè
jiāhuo
家伙
shārénjiànxuè
杀人不见血
  
,
yào
zhuā
dào
fànzuì
犯罪
de
zhèng
证据
róng
容易
  

This guy kills without blood, it's not easy to get evidence of a crime.

2
Xiàndài
现代
zhànzhēng
战争
tōngguò
通过
shēng
生物武器
shǐ
使
rényuán
人员
  
shēngchù
牲畜
nóngzuō
农作
zhìbìng
致病
huò
  
,
shì
zhǒng
shārénjiànxuè
杀人不见血
de
武器
  

Modern warfare, in which people, livestock and agricultural products are sick or killed through biological weapons, is a weapon that kills blood.

3
Zhèxiē
这些
guǎimài
拐卖
értóng
儿童
de
zuìfàn
罪犯
shì
shārénjiànxuè
杀人不见血
de
  
,
men
他们
shǐ
使
duō
许多
shī
失去
háizi
孩子
de
父母
shī
失去
le
zhèngcháng
正常
de
shēnghuó
生活
  

These child-trafficking criminals are also murderous and blood-stained, and they have left many parents who have lost their children out of their normal lives.