As an American mother in Shanghai, Lenora Chu viewed her kids’ classmates as model citizens. Once she began talking to their parents and teachers, though, she discovered that the country’s militaristic approach to education comes with a price. Chu talks with us about the crushing pressure on Chinese students to succeed, which she writes about in “Little Soldiers: An American Boy, a Chinese School, and the Global Race to Achieve” (HarperCollins).