Did America block Chinese social media services? Did America steal Chinese intellectual property and build entire industries based on copying Chinese products?

Did America block Chinese social media services? Did America steal Chinese intellectual property and build entire industries based on copying Chinese products? A trade war doesn't just mean tariffs, it can happen in various forms. American companies did not have a fair game from the getgo competing with chinese companies, it's just that no one cared until now. So, who started this?