The yellow BYD Seagull electric hatchback.
The BYD Seagull.
  • BYD, Tesla's biggest electric vehicle rival in China, is quickly gaining on Elon Musk.
  • Its founder, Wang Chuanfu, once drank battery fluid to impress big-name investors, the Wall Street Journal reported. 
  • BYD is on track to tie Tesla in EV sales this year.

The founder of Chinese automaker BYD, Tesla's biggest global EV rival, once drank battery fluid in front of a big-name investor to show just how serious he was about his company, the Wall Street Journal reported Wednesday.

Electric-car giant BYD first launched as a battery maker but has since grown to become arguably the most impressive and quick-moving EV manufacturer in China.