Although BYD has core battery technology, its technical level needs to be improved. Compared with foreign companies such as Volkswagen and Ford , BYD's cars have just started, and their manufacturing processes need to be improved. In recent years, Gu customer reflects the battery down faster, the battery level display is not synchronized, large car starting difficulties and noise, pedals easily small fracture and other problems. These seem inconspicuous, but directly affect the customer's comfort, and also affect BYD's good image among customers.