In Depth: How a Greying China Is Challenging the Health Care System

Amid an unprecedented demographic shift, China is embracing a revolutionary transformation in health care for the elderly.

The number of Chinese people at age 60 or older tops 300 million. That group by itself would be the world’s fourth-largest nation, behind India, China and the U.S. The total may exceed 400 million by 2040, according to the World Health Organization.