Basically, Elon Musk set up his Tesla sweatshops in China, those shameless Tiongs copied and stole some of his tech, and mass-produced BYD and various other Tiong brand EVs.
A solemn warning to anyone who still wants to do business with or set up shop in China. It might not even need to be some super high tech stuff or involve amazing intellectual property. Could be just F&B or low-end stuff. Your ideas will be stolen.