I see -- using the same format, this is what I believe J-20 and F-22 share:
..........|...............|...........
........./.................\..........
......../___.........___\.........
From this photo we can see the "horizontal" panels with the panel lines
From this one you can almost make out the horizontal panel from the starboard bay door.
Actually, if you look at the area around the port rear landing gear, you can see the sillhouette of the horizontal panel door sticking quite distinctively there.
With this image, you cannot see the horizontal panel due to the angle but it's high res enough that you can see the hinge connecting it to the bay door, as well as the white line indicating the interior of the horizontal bay.
Everything points to J-20 having that kind of weapon bay config. We need to wait for a clear frontal or rear shot to confirm this.