Amazon Wants to Disrupt Health Care in America. In China, Tech Giants Already Have.

Amazon and two other American titans are trying to shake up health care by experimenting with their own employees' coverage. Technology companies like Alibaba and Tencent have made health care a priority for years, and are using China as their laboratory. After testing online medical advice and drug tracking systems, they are now focused on a more advanced tool: artificial intelligence. Their aggressive push underscores the differences between the health care systems in China and the United States. Chinese hospitals are overburdened, with just 1.5 doctors for every 1,000 people -- barely half the figure in the United States.