The second smallest planet in our solar system (not including Pluto . . . for now) is Mars. Daniel and Mo knew that, so to them as well as those about to rock, I salute you.
Now this is it, the last second question of the series. It's not a last-second question. You can take all day to answer it. I just won't ask any more questions about the second most, second biggest, second smallest, or second funniest, second ugliest, or second least politically correct things in the world. After today, that is. Let's hope your knowledge of non-record-holding stuff holds up for one last day. Here's the question:
What is the second largest city in China?