Correct

置信

/ zhìxìn / 
Strokes

Definition

to believe (what sb claims) (usually used in the negative)/(math.) confidence (interval etc)

Example

As a Verb

[usu used in the negative] believe

1
Lìng
令
rén
人
nányǐzhìxìn
难以置信

be unbelievable/incredible/implausible