àn​tú​suǒ​jì

to follow clues

按图索骥 按圖索驥 àn​tú​suǒ​jì
to follow clues
To try and find something with the help of a clue or lead; to follow a trail or evidence to reach a goal.
to look for a fine horse by a picture
To follow old methods or rules mechanically without flexibility or original thought; to do things along rigid, conventional lines.

Frequency

Movie subtitles
0.030 per million appears in 0% of films
Written text
0.333 per million

Sources