Which is the tallest dam in the world?
Which is the longest rail-road bridge in the world?
What is the national currency of China?
Which is the longest canal in the world?
Which is the largest populated country in the world?
Which is the largest planetarium in the world?
What are the national fruits of China?
What is the national tree of China?
Which is the highest airport in the world?
What is the national animal of China?