SU7 Ultra sets record for fastest four-door EVIt features the largest carbon disc brakes of any production sedanDue to be delivered to first customers next year Xiaomi’s debut SU7 electric vehicle has been a runaway success for the Chinese smartphone maker, but it isn’t done proving that it is the master of cooking up a sales storm in its domestic market.Xiaomi founder, chairman, and CEO Lei Jun unveiled the SU7 Ultra prototype during an annual conference in July this
