Sanctioning china for "values" is as absurd as china sanctioning the US for "values". How would everyone react to china sanctioning the US or Europe for invading much of the middle east and north africa. Everyone would laugh.
Also, sanctions are acts of war at best and war crimes at worst. Economic sanctions exist to starve and hurt the population to punish the government. By any objective measure, it is a war crime and crime against humanity. "Luckily", rules and laws don't apply those with the greatest weapons.
Also, I highly doubt most of china's people would side with the US against their own government. No more than we'd side with China over the US government. That's not how people work. Especially if foreign government are attacking your own government.
Either we go to war with them or we decide to live with them. China has 1.4 billion people. The idea that we'd pressure them to act a certain way is ludicrous. More than anything, it'd probably have the opposite effect.