cool update meng, I'm not gonna let you off easy though. The composition on June 18th looked better, If you would have kept the same lighting but tightened up the details it would have made it much stronger as opposed to adding more and more lights and details. The thing that did improve by adding more was the two figures in the foreground, and if they're supposed to be adults, they're out of proportion. Utilize your polygonal lasso tool more when you're working on that architecture in the middle ground, it lacks some strength because the buildings feel floppy.
I think it's just a natural thing that happens when you start spending a certain amount of hours on any painting, it's not always better to add more. I think I did something similar recently, spending too much time adding more and more and more, not always the best move but yeah, it's a cool piece.
Love those environments Dile, and I mean LOVE them... nothing for me to crit really, other than perhaps work a little more on getting a strong sense of perspective. As others have said, The mid-ground could do with a bit more solidity, and sometimes throwing in a clear suggestion of a vanishing point in the distance can really help. Anyway, congratulations on this one because its excellent.