Electric Viking's take on YangWang
not exactly complete, but catches the major point.  BYD is sending a message here with this new brand and electric vehicles are just inherently safer and more capable than their ICE counterparts.
Tesla is down pre-market.  On the same day BYD launches Yangwang, Tesla cuts prices.  Shows the brand direction.  Now that Tesla has lost its brand luster in China, it's going to be tough for them.
Another news is that there are more automakers that are using BYD's DM technology. Given how efficient it is, this could be another area of expansion for BYD.