No one is clean in this. Now, the thing is that China did not allowed all companies in and after 10-20 years said: yeah, now you need a local partner. It was like this from the beginning (and it is not the only country in the world that required this, to have a local partner with 49 or 51 percent stake in the company). So all the companies that rushed into China were aware from day one that they need to share technology and know-how with the Chinese.
I think the question is: did China ever took over a foreign company because "national security" or whatever perceived risk?
At least in the context of trade over the last 35 years, there has been an imbalance.
As for 'Arbitrary Rules' - it's a fair claim and the US, EU etc. need to establish clear and fair terms. So should China, India, Brazil, everywhere else.
I think the question is: did China ever took over a foreign company because "national security" or whatever perceived risk?