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It does look like a shadow cast from something below, not above. However, the moon was 85% waxing gibbous, so it would have been bright and in the sky and a shadow could have been cast the other way.
Couple things: 1) The moon is an area source of light, not a point source, and as such casts umbra/penumbra shadows. If this were a dark object backlit by the moon, the shadow on the clouds would not be crisp like it is. 2) I have never been to Shanghai but it looks like it tends towards a low marine layer. Uplighting from below is going to be brighter just because of the distance fall-off. If this were Denver? Yeah I could see the argument but I mean