Over the past 20 years, hundreds of millions of people in China have been pulled out of poverty by their country's staggering economic growth. Beijing today is a rising power on the global stage. That's all pretty great, and yet the country still ranks beneath war-torn Libya and perpetually melancholy Russia in the United Nations World Happiness Report. This week's Economist hazards a guess about what really makes people smile or scowl, but here's how China stacks up for joy against other countries.