the pace of development of new energy vehicles far beyond people’s expectations, from 2017 to 2019, progress in electric vehicles very quickly. 
First, in terms of mileage, advancement of pure electric vehicles very quickly. Around 17 years of pure electric vehicles, but its mileage performance
300-400km, but by 2019, the mileage performance of pure electric vehicles has come 500-600km, many models even more than Mileage 600km, such as Guangzhou Automobile new energy AionLX, maximum mileage reached 650km.
Furthermore, in terms of three electricity system security, progress pure electric vehicles is also very significant. Now pure electric car battery high standards in reliability testing, high voltage batteries and battery test underpinning safety, appeared very out of color. At the same time, pure electric vehicles BMS management system is also obvious progress, it can achieve longer battery life mileage, maintain a more stable battery status and so on. 
The time now has come the year 2020, I believe 2020 pure electric vehicles will make great progress. For example, in terms of mileage, if the solid-state battery in use, battery energy density has been greatly improved, it is estimated that the mileage performance of pure electric vehicles will have more breakthroughs; Furthermore, in the three-level system security, I believe this year new out of pure electric vehicles will be in a more comprehensive and complete.