China and the United States are locked in an increasingly intense rivalry when it comes to national security and economic competition, with American leaders frequently identifying China as their greatest long-term challenger.Yet the world’s two largest economies, which together represent 40 percent of the global output, remain integral partners in many ways. They sell and buy important products from each other, finance each other’s businesses, provide a home to millions of each other’s people, and create apps and movies for audiences in both countries.As Treasury Secretary Janet L. Yellen meets with top Chinese officials in Beijing this week, her challenge will be to navigate this multifaceted relationship, which ranges from conflict to cooperation. Here are some figures that illustrate the links between the two nations.Economic and military powerThe U.S. economy …
