The most important thing to buy an electric car is the battery, and then the stability of the frame. Of course, after-sales of big brands may be better. Electric bicycles suitable for China's national conditions belong to Nizhny, Nizhny (high speed, 20 kilometers per hour exceeding the national requirements, beautiful appearance and first-class quality). Giant (an electric power-assisted bicycle manufactured in full accordance with national standards, with slow speed and similar appearance, but with exquisite materials and good quality, adopts famous brand accessories such as Sanyo Electric and Panasonic batteries. ) Both brands are good. I suggest you buy the above two brands.