The special problem with the electric bikes is that they're almost silent and move very quickly. It shouldn't be that way, but walking in China these days you have to be very careful not to make any sudden movements sideways. Or you could get ploughed down. Just walk dead and predictably straight ahead.
So easy to solve the problem with a few speed bumps on pedestrian walks, but I've never once seen them. Ironically, it's the upgrading of urban infrastructure with smooth and well-maintained walkways that's created the problem: they're just too attractive for bikes.