On this week’s Tech Nation, Moira speaks with Yale Professor Jing Tsu about “Kingdom of Characters … the language revolution that made China modern.” Communicating Chinese using digital technology is not so easy, from the telegraph, the typewriter, computers and smartphones. All were built with alphabetic letters in mind. Then, diagnosing neurodegenerative diseases – like early Alzheimers, Parkinsons and more – with a simple-to-use but scientifically advanced retinal scan.