This shade open/shade close thing never ends
But just a word of caution for those flying on CA. If the FA tells you to close the shade, just close the shade. One flight from PVG to HAM, a passenger insisted to keep the shade open after FA ask to close it. Next thing we knew the Cpt. came over and told pax in question, if refuse to follow FA instructions we are turning back with Chinese PAPF waiting.
The plane got real dark real fast. Btw I never voluntary flew CA again.