SHANGHAI — As she turned 30, Shen Feifei’s life was right on track. She had graduated from a top university, landed a job at a multinational, and started a family. But two years later, things are very different. Both Shen’s parents have been diagnosed with cancer, and the stress has become overwhelming. She often suffers from insomnia. Her sleek black hair is streaked with gray. … Continue reading The Biggest Losers From China’s Aging Crisis? Millennials.