It’s really, really hard to convey the scale of China. My usual strategy is to talk about the number of cities that have, say, over 10 million people in them, or whatever.
Here’s one fun fact we learned the other day: the best hospitals in China have on average daily outpatient numbers of 10,000 people. 10,000 outpatients every day. The biggest hospital in the world is in China: 5,000 beds.
Also, there are 470 million pigs alive in China right now.