@Hsun36973087jxfp: Are you saying you want the image in photo B to be a sticker on the glass doors of photo A?  If that is what you want, Photoshop is the best tool for that.  Firefly cannot do that.  I would recommend you ask this question in the Photoshop forum.

If I did not understand what you were asking, please clarify.

how to synthesis  photoB to photoA

i mean like for synthesis the item into my order area Platform door sticker
then end one will be likes photoC?
thank you !

(photoC)

(photoA)
(photoB)