My Nth trip to the city

I have been in the city many times. Actually I had lived in the city for 4 years. And during my other 3 years in U.S., I have made frequent trips to the city. There seems never to be a huge reformation here. It's the same street, same avenune, even the same atmosphere of crowdedness. I remember going back to Beijing and experiencing a huge change, almost like a cultural shock. However, the city seems to be there forever. Almost nothing last forever, the city probably is changing slowly and gradually without me noticing. The illusion of eternity reflects my constant shift of emotion. It does change, but not necessarily parallel to how I feel.