Of course you can leave China/choose not to enter China/be blocked from entering China and still be very successful, check what Google did 7-8 years ago. The same can be said for a long list of highly successfully American high tech and not that high tech companies, e.g. Facebook, SpaceX, Berkshire Hathaway etc.

The mentioned 52% or 51% ownership is nothing but protectionism. It is nothing different from Trump asking certain US products to be made in the US.