Looks like a "reverse batman signal" to me.

You mean, a shadow cast by a building onto a cloud? That seems like the most plausible explanation, but if that's the case, why isn't it a constant feature, why is it only appearing now? Also, it looks more sharply defined than I would expect if that were the case.

> why is it only appearing now?

Maybe the clouds have to be just the right height/composition to see the effect. If the clouds were higher it might be too small and diffuse to see, maybe the lower clouds are partially blocking some other light sources making it much more pronounced or something along those lines.

Why did no one break out a high powered laser pointer or range finder?

I feel that if it was cast from a building, the shadow would be stretched down to the source. However maybe a shadow from some kind of kite?

Appears not, it can clearly be seen above the cloud or smog, this sped up video shows this to be the case: https://www.reddit.com/r/UFOs/comments/o5r4hw/sped_up_shangh...

A shadow cast at a distance has blurry edges. Those are crisp. Also, there are clouds that pass in front. I wonder if 1+ drones are creating this visual

Someone on reddit translated the words and a few others chimed in that the speakers sounded really authentic

EDIT: found it, https://www.reddit.com/r/UFOs/comments/o5g78m/triangle_over_...

IsaKissTheRain on Reddit commented:

8h There are multiple videos, from different angles. I also ran two of them through some software made for detecting artefacts of CGI. Nothing popped up.

The dialogue, since I understand Mandarin, also matches up and seems very genuine. -----------

Pitter patter.

True, though something odd is that there aren't multiple videos. Multiple ones available are all from the same building, maybe even same room

this video was linked from the thread and appears to be a compilation of several videos shared on social media: https://youtu.be/WWo0b-g0iZU

Yeah to me it looked like there were several different videos, and even though I have no idea what's being said the tone of the background voices seemed to sound like other people nearby noticed it

The second video in that Twitter thread is from a different building. You can see when they pan down the skyline's not the same.