Come January and February each year, much of China’s population gears up for the world’s most massive coordinated migration. The Lunar New Year is traditionally spent with family, which means that millions of people across the country pack their bags and head home, a process known in Mandarin as tuányuán (团圆), or “reunion.” Growing up in a Chinese family, I was no stranger to this tradition. Though our Lunar New Year celebrations were relatively tame by Chinese standards, the 2-hour drive from our home in suburban New York to my…