Correct

心中无数

/ xīn zhōng wú shù /
Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/心中无数-Chinese-idioms-Cchatty-6354db21-7ca8-4f85-a284-7c2c0cd74c94-1612777057.jpg

Collocation

1
心中无数的事
2
不可能心中无数
3
他对这事心中无数

Definition

心中无数

Literally means:

have no number in mind

Actually means:

It means having no idea or not being sure about something. It is the opposite of 心中有数. 指对事情不够了解,处理起来没有把握。相对于“心中有数”。

Example

Used as predicate, object or attributive. (作谓语、宾语、定语)
1
duì
cǎifǎng
采访
de
zhě
记者
shuō
  
,
gāng
diào
dào
zhè
这里
  
,
duì
zhè
这里
de
qíngkuàng
情况
xīnzhōngshù
心中无数
  
,
无法
huí
回答
men
他们
de
wèn
问题
  

He told reporters that he had just been transferred here and was too concerned about the situation to answer their questions.

2
hěn
jǐnshèn
谨慎
  
,
cónglái
从来
zuò
xīnzhōngshù
心中无数
de
shìqing
事情
  

He is cautious and never does countless things in his mind.

3
Lǎozhāng
老张
shì
zǒngjīng
总经理
  
,
duì
gōng
公司
de
jīn
资金
néng
可能
xīnzhōngshù
心中无数
  
kěn
不肯
tòu
透露
bàndiǎnr  
半点儿
xiāoxi
消息
  
,
kǒng
恐怕
shì
yǒu
biède
别的
yuányīn
原因
  

Lao Zhang is the deputy general manager, the company's funds can not be countless hearts. I'm afraid there's another reason why he won't reveal half the news.