For many countries, annual GDP growth of 4.5 to 5 percent would be a very good year. For China, which announced the target this year, it’s setting expectations deliberately low. After more than three decades of sky-high growth—regularly topping 10 percent a year—Beijing’s economic ambitions have been brought back to earth. And that has changed far more than just the country’s economy. Until the late 2010s, the entirety of Chinese life was shaped around the reality of high growth. People took on