One thing for sure, that is not a Japanese knot weed. Japanese knot weed is not a woody plant. in which the mystery plant is.
I crop the picture above
The mystery plant seems like a shrub, or tree sapling, a woody entity with opposite leaves.
I do not know what that is, when it leaves out it might be easier to ID with leaves, but it reminds me of Privet (Ligustrum sp), it could be many other thing though.
Please compare to cropped capture image from
https://www.zahrada-cs.com/fot...
