Yup. China has been systematically stealing the IP of anything made in their country since forever. Companies kept falling for it because the potential market looked so big. Now BYD makes cars as good as Tesla and it's all #ShockedPikachuFace
Not that is matters. Cars, including electric cars have been around for 100 years. There are very little important patents he could have. Sure there is a lot you can patent, but the vast majority is details that are trivial for any competent engineer to work around just using known prior art.
The important patents are likely in batteries which Tesla doesn't develop. Or chargers, but again the important details come with the battery.
TESLA might have some patents on the NACS connector and similar things. Those are easy to work around, but you wouldn't want to.