peep 窥豹一斑 管中窥豹
It means looking at the leopard through the small hole of the bamboo tube, and only see a stripe on the leopard.
The metaphor only sees a part of the whole thing, which means that what you see is not comprehensive or only get it partial.

Photographer - YUKI TAN
Model - Eliza
Make up artist - Qiushi Wang
Styling - Quinnie Yan