tóu​shí​wèn​lù

to test the waters

投石问路 投石問路 tóu​shí​wèn​lù
to test the waters
Literally means to toss a stone to check the path ahead; used to describe taking a small initial action to gauge a situation before proceeding with a major plan.

Frequency

Movie subtitles
0.120 per million appears in 0% of films
Written text
0.315 per million

Sources