Here's an idea: EU, US, and Japan should slap a 50% tariff on all Chinese goods (made in China, or from Chinese companies). You're stealing our techs to sell products back to our markets? We're punishing you with a 50% cut first.
And then China will reply - "with a couple of recent exceptions, we ain't selling back shit - it's your companies who pay us to manufacture stuff for you, and then they sell that stuff to you for 400% the price".
And then the rest of SE Asia will reply "we'll gladly take all the manufacturing from China" And then EU, US, and Japan says "we better speed up moving out of China". And China was never heard of again.
And then the rest of SE Asia will say, "oooh, juicy IP coming our way, just asking to be copied!".