1. the semi-small street that I live on (Tianping) has bike lanes
2. the larger street 1.5 blocks away (Hengshan) does not

In both cases, bike, ebike, and scooter riders seem to love sidewalks. I imagine that case 2 is legal because riding on a busy road along with cars that are going twice as fast is dangerous, but I'm wondering about case 1 in Shanghai, as well as other cities (e.g. Nanning is particularly scary for pedestrians).