Tonight the transparency is pretty high, I would rate it a solid 8/10, but of course, it's just by the standard of Hong Kong. If I took into account of the great sky from other part of the world, it would become a very poor 4-5/10 at most.
I could see no more than 20 stars with naked eyes, that's it. The sky is still showing a dirty bown hue...
However, it's already great in our standard. I didn't take any images tonight, since there's no good object from inside my home. Also, why it's so transparent is due to the wind.
Anyway, worth to write down, just as a record.