I realize that, however the source I had for this information had Hong Kong separated as its own statistic and was still in the top 50. I've decided to make a change to this quiz that will allow an answer of "China" to be accepted for both the answers of China and Hong Kong. Thanks for taking the quiz!
Hong Kong is a weird thing. It's now part of China, but as part of it's "reintroduction" to the country, it's gotten special priviledges. And it's distinct enough that you have to show a passport when you travel between it and mainland China (whether you're Chinese or other). For more, check out this video by cgpgrey:
Cool quiz, though there are so many countries listed and so much time allotted that eventually it just becomes another countries of the world quiz. Somehow I managed to miss Japan...
I would gladly update this quiz, however I have only been able to locate sources with the top 10 countries listed. If I find a longer list I'll certainly do an update!
Could you update this? I think a lot has changed in the past decade. If you need a source, you could use this: https://worldpopulationreview.com/country-rankings/facebook-users-by-country
https://www.youtube.com/watch?v=piEayQ0T-qA&list=UU2C_jShtL725hvbm1arSV9w
Anyhow, I think it's a good decision to allow China as an answer for Hong Kong, because who would get it otherwise?, since Hong Kong is not a country.
Check out my quizzes :)
They have their own social media platform supplied by Tencent.