I share the same idea as you do, but I think other users here want to see China react in such matter in order to deter the US from doing similar actions in the future or going forward with it in the first place. I think there's no way China can ever deter US from doing these moves or from trying to increase tensions in the straits, its not because China is weak rather its because the US has a lot more to lose if they don't do something to put China down, and the only smart play China could do is to circumvent and adapt to these new conditions to their own favor.
I would consider it a win if they could help Hikvision circumvent these conditions and adapt to further escalations for other companies by preparing the system and contingencies beforehand. As US continues with these belligerent action, I see it as an opportunity for China to justify bending the rules in the future, and I can't wait for the day that China decides to completely unrecognize US patents or copyrights, and starts demanding payments in RMB for trade and for paying foreign debts.