Angelic Vision seen at Shanghai Expo

The hallowed grounds of the Seed Cathedral - a veritable Garden of Eden - are inhabited by Angelic beings whose inscrutable purposes can only be guessed at: are they, in their beauty, grace and poise, an example to ordinary humans allowed into The Garden. Or are they perhaps just Park-keepers of Paradise, preventing ballgames and licentiousness while grudgingly(but cherubically) picking up litter... ?