Opium, huh? That is interesting. What about its international relations? 
 That is a lot of people for just one city! Can you please tell me about the history? 
 No, thank you very much. You have helped a lot. 
 No, I beleive that is explained in my answer above. Sorry if it wasn't clear. Can I help you to learn anything else today? 
 It's the biggest city in China and one of the largest in the world, with a population of about 24,000,000 people, and is the biggest port in the world.
It's the biggest city in China and one of the largest in the world, with a population of about 24,000,000 people, and is the biggest port in the world.