Bill Gates says she's changing the game. So does Al Gore. Tech teen Emma Yang, who grew up in Hong Kong and now lives in New York, loves her grandmother so much, she's created an app that uses facial-recognition technology to ensure that her family - and potentially millions more - can communicate meaningfully with people with Alzheimer's. James Chau met Emma in New York, where she gave him a preview of her Timeless app and discussed how humanizing technology can help create a better world.

Millions of young Chinese are heading West to study, transforming the educational experiences of Chinese and Americans alike. Nini Suet is enmeshed in this world. The Beijing-born Princeton grad started an education business that tutors young Chinese for boarding schools in America, and prepares them to interact with an entirely new culture. She talks to James Chau about the magic that happens when these Chinese young people come together to with their American counterparts.

Novelist and New York Times writer Ming Liu, who turns her voice to maybe China's greatest export – food. But what makes it so good? Interview by James Chau.