“水库”地点数量≥300的地级行政区 Prefectures with ≥300 reservoir sites

Can you name the cities that are served by the world's 50 busiest airports?

When you guess a country, all the countries it borders will also be completed. Can you fill in the world map in just 90 seconds?

Drag the flag onto the correct country. Careful, though! One wrong move and the game ends.

On each line, you will see three countries. Guess the one that has the highest population of the three. One wrong guess and it's over.