China's BYD on Monday started offering advanced autonomous driving features on most of its models including ones priced as low as $9,555, far undercutting competitors such as Tesla in a move analysts say is set to start a new price war.

And what is more, they are packaging it in electric cars that are already dramatically cheaper than anything from Tesla. Take the BYD Seagull, a car priced at just $9,500. The Chinese automaker, which has overtaken Tesla in sales there,

Chinese electric vehicle giant BYD plans to begin sales of 21 models equipped with its "God's Eye" advanced driver-assistance system (ADAS), it said on Monday, intensifying competition in the smart electric vehicle market.