I live in a big city With an estimated 2016 population of 8,537,673.
Wow, really. Please what is the name of the city
The City of New York, often called New York City or simply New York which is the center of commerce of the county
That is lovely, New York is a big city. What is their commercial value
They are regarded as the global power city because of their  cultural, financial, and media capital of the world, and exerts a significant impact upon commerce, entertainment, research, technology, education, politics, and sports.
Awesome, what kind of sports do they engage in?
I could not pin point out one but i know with the  with an estimated 23.7 million residents as of 2016 there will be lots of them
OK. What about their cultural value, do u know any?
Well it is an important center for international diplomacy.