As early as 2003, BYD invested a lot of manpower and material resources to develop the plug-in hybrid system, and in 2008, it launched the first generation of DM technology and put it on the F3DM. It was officially launched in 65438+February 2008 and 65438+May 2008, becoming the world's first mass-produced plug-in hybrid vehicle, while the Honda i-MMD with similar technical concept was not released until 20 12 years.