One day last October, sitting in the courtyard of his house in China's Henan province, Dong Hui decided to see if he could hold a pen to write. Dong, 39, had sustained spinal cord injuries in a car accident six years earlier that left him paralyzed from the neck down. Slowly but determinedly, he wrote...

This is today's edition of The Download, our weekday newsletter that provides a daily dose of what's going on in the world of technology. China has approved the world's first invasive brain-computer chip-here's what's next Sitting in the courtyard of his house in China's Henan province last October, Dong Hui decided to try holding a...