Translation:Shanghai is a big city.
"Shanghai is a large city." <- Please program this as an answer. I believe that there's many fundamental issues with having English speakers type in the answer. There are many different types of word usage and choice differences from person to person, not to mention from country to country (American English vs. British English for example).
So true! As of China's 2010 census, Shanghai has over 23 million people within city limits, likely the biggest city in the world. (As of 2019, there are likely four other cities worldwide with over 15 million people within the city proper: Lagos, Nigeria; Istanbul, Turkey; Karachi, Pakistan; and Delhi, India.)