I can guess what it could be - design borrowed / reused from One+6, SD 845 SoC and some new UI with some software tweaks here and there.
This time it's a reverse trend - OPPO copying ( reusing) One+ 6 design ( in recent past it was One+ copying OPPO VIVO)
Find series shall be all about - finding right way to imitate, yet claim to be different.
Poor chinese manufacturers. They copy everything from Apple, even model names.
Yet another iPhone copycat. I am tired of seeing the same design over and over again, yet they are not.