China's advocating non-interference in the domestic affairs of sovereign states is rooted in its own tragic experience when its empire's weakness was exploited by foreign states. It rejects calls for intervention on grounds of another country's political structure, internal conflict, etc., as it believes such intervention can lead to abuses and rationale for renewed interference in its own internal affairs. Whether intervention was pursued along the lines of the 2003 Iraq War aimed at toppling Saddam Hussein or under the Obama Administration's "Responsibility to Protect" principle, China believes such intervention is illegitimate. Of course, China takes a different posture when it comes to Taiwan, as it sees Taiwan as an inherent part of China that had temporarily broken away.But China's understanding of this doesn't end with their experiences with Japan. The current military spending spree, (approximately 18% annual increase) has directly correlated to US military adventurism in the Middle East which has taken both China and Russia's breath away. And they have declared there concerns over it, and even blocked further US aggressions at the UN level.
The current U.S.-Russia tensions have led to a closer relationship between Russia and China. Common interests between the two countries are also playing a role. How deep the relationship grows remains to be seen.USFP is pushing Russia and China together, and pushing China on the Spratlys, (and greater SCS) and coming to unfounded conclusions about their intentions is either the product of bias hatred of China (god knows why) or just plain ignorance, or maybe both.