Viet always puts his good man-ness to the front.
Please find a box that has green on both the front and back sides.
Whenever we send a letter or a package, we put the Tofugu sticker on the front of it.
The front face of something is the front or the front side of it (kind of like how 外面 is the exterior because it's the outside face).
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.