The structure femjoy_116704_020.jpg is a classic database naming convention: : Identifies the source studio.
If you are looking for this specific image for research or aesthetic analysis, it likely belongs to a set from the mid-2010s. During this period, Femjoy transitioned from standard definition to high-resolution "4K" sets, making files from the 116000+ series part of their high-fidelity era.
: This indicates the 20th shot in that specific series. 2. The Artistic Philosophy: "The Femjoy Style"