Chinese automaker BYD has surpassed its annual sales target a month ahead of schedule, delivering 504,000 passenger vehicles in November.BYD's success puts pressure on Tesla as it fights to become the world's largest EV producer.Tesla has sold 1.29 million cars this year and is offering end-of-year deals to reach its goal of selling more than 1.8 million vehicles.BYD has sold 1.56 million battery-electric vehicles this year, leading the race in selling the most EVs.