As the world’s two superpowers grow ever further apart, the internet environments in the US and China continue to grow stronger separate digital worlds . US internet companies have largely flopped in China, and with notable exceptions, Chinese-made apps have not grown big outside of their home country. Digital life in each country is largely shielded from the other, but the two online spheres are not completely isolated. There is a cross-fertilization of digital ideas between the US and China, as well as threads of interdependence, showing that hard borders and political divisions are not absolute impediments to the internet...