Correct

查访

/ cháfǎng / 
Strokes

Definition

to investigate

Example

As a Verb

go round and make enquiries; investigate

1
Ànzhōng
暗中
  
/
mìmì
秘密
cháfǎng
查访

take up investigation secretly

2
Cháfǎng
查访
ànqíng
案情

investigate details of a case