That third link is fascinating - not just for he insights into how Chinese censors indirectly guide producers, but also for the lack of ironic detachment and self-awareness shown by the American analysts, eg
Red Dawn, a remake of a 1980s action movie about a Soviet invasion of the United States, was originally shot
featuring China as the antagonist invading the United States. According to Mr. Shiao, however, the Chinese are
“not interested in their country being perceived as a violent military threat to the lives of average Americans.”
and
A 'Captain Phillips' executive identified the tone of the film as a source of discomfort for censors, particularly
“the big Military machine of the U.S. saving one U.S. citizen. China would never do the same and in no way would
want to promote this idea.”
While I think censorship an unwise and ultimately self-defeating policy, and also agree with the basic premise that a good many of the rules are just dressed up protectionism, I can't really blame China for declining to import overt propaganda. China makes lots of propagandistic films, but the propaganda is mainly about what China should be like. It'll be some time before they produce an overtly anti-American film like Brother 2 or Valley of the Wolves (as opposed to striaght-up propaganda: https://www.youtube.com/watch?v=M_8lSjcoSW8) and I doubt whether it would be well-received here if they did.