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.