Until two years ago, people in China who wanted medical care from Brigham and Women’s Hospital, an affiliate of Harvard University, had to take a 7,000-mile plane ride to Boston. That all changed in 2018, when the Boao Evergrande International Hospital opened on China’s Hainan island. The facility, a Brigham partnership with one of China’s biggest property developers, is focused initially on treating breast cancer.  Brigham is only one of a growing group of world-renowned American