Portraying life as better now, is propaganda. Its a view that affirms the current government policies (even if you don't personally believe it).
Propaganda is very unique in China and communism. Mainly because it is unified, enforced, systematic and backed up with violence. The communist party have been in rule so long that they are experts in it and social engineering.
Taking any view on what the public think of its goverment, ain't easy or factual. It fraught in one of the most organised regimes of properganda in existence today.
You can't compare that to America, where you can openly disagree with the government. Without fear of imprisonment in a work camp without trial.
Basically when you say things like life is better because peoples positive views support it - I hear nothing but the torture and oppression which supports that state. And that ain't improvement. Its propaganda and control.