That's fair. I do think China would probably just omit viewpoints rather than outright lie and it'd be hard to detect.
I guess I don't personally fear China as much as Congress does, I view them more as a rival than an enemy. I wish them well, and hope they make more cool apps and games for me to enjoy. And they'd probably love nothing more than for us to overthrow our oligarchs (just like we want to see the fall of the CCP), and that's not necessarily against my interests as a regular Joe.
I can understand why Congress is concerned, I just wish they'd try to address the root of the problem (enforce common safety and transparency standards for all social media) rather than the targeted approach they've taken.