you need very expensive license plate and driving permit to drive car or motorbike, most of Chinese have neither of these, thus popularity of ebikes (no driving permit, no license plate) especially since most of Chinese are stuck all year in megacity they live in and go outside maybe twice a year (spring holiday to see parents, national CCP holiday to travel abroad or around China), electric cars in China are even bigger niche than in West, since even car ownership is extremely low and undercapacitated infrastructure can't deal already even with low car ownership