The village children spotted the outsiders quickly. They heard their attempted greetings in the local language, saw the gleaming Chinese flags and round face of Mao Zedong pinned to their chests, and knew just how to respond. “I love China,” the children shouted urgently, “I love Xi Jinping.” Over the past year, reports have found their way out of the Xinjiang Uighur Autonomous Region in western China of a campaign of religious and cultural repression of the region’s Muslims, and of their detention and confinement in a growing network of razor-wire-ringed camps that China’s government at times has dubbed “transformation through education centers” and at others “counter-extremism training centers” and, recently, amid international criticism, “vocational training centers.”