I like the exposure, the composition and the B/W. It all comes together nicely, with one tiny exception; is that a star-trail of Venus in the upper right corner, or a spot on the sensor? Whatever it is, I'd clone-stamp it away. It doesn't do anything for the composition, and it draws the eye away from the main subject. If you printed this, it would always look like a fault and be a distraction. I bet you were happy when you saw what you'd got on the computer. Well shot!
Another piece of advice; please don't call me "sir". I'm Australian, my name is Ian, all my other friends call me Ian. You should too. I know that it is good manners and that you use the title "Sir" out of respect, but please address me as a friend. your friend, Ian ~ 延安