How to say "是先摸清楚他们的底细" (shì xiān mō qīng chǔ tā men de dǐ xì) in Chinese dialogue

shìxiānqīngchǔmende

is to figure out their backgrounds first.

Idioms & Colloquial Expressions
Grammar Patterns
INTERACTIVE SCRIPT TIMELINE
LINE 0112:10
zán
men
yào
zuò
de

What we need to do

LINE 0212:11
PLAYING SCENE
shì
xiān
qīng
chǔ
men
de

is to figure out their backgrounds first.

LINE 0312:13
ruò
shì
zhēn
de

If our guess is proven correct,

Show Information
Source MediaTV Series
Season & EpisodeS1 E19
Timestamp12:11
TMDB ID272715