What's important is to note the position of the O man's head. I suspect, and before the end of his reign...the position of the O man's head while greeting the Chinese...may be a bit lower.
More importantly, while the O man maintains the front, forward bow...the 'merican people will inevitably be forced into a position that resembles bowing in the other direction, while the Chinese maintain the (front) position as illustrated in the Drudge Report picture.
So now...while all of this may sound a bit confusing, let me cut to the chase...
...all of us should get ready for some "dong tween cheeks".