It seems like they attached the scope in opposite direction in above two picture. Or are they using different scopes ?
Different scopes.
In the first picture you quoted, it seems to be a different scope we haven't seen before. The geometry of the eyepiece makes me wonder if it's a LPVO. But might be an older scope. Attached on rifle variant QBZ-191.
Edit: nvm it's an old scope developed previously for the CQ export rifle.
The second picture is the scope that we've seen on the QBZ/QBV-191 before, as the rifles in that pic are that variant.
Third picture is the ACOG like fixed magnification scope that we know and love.