The problem is, and will continue to be that "harmony" will be used as an excuse for "control" and anything that threatens the control of the communists will be sold by the government-controlled media as something that threatens "harmony". It will actually be true also that what threatens that control will threaten the civil harmony, because the dictators will fight such threats forcefully.
The Chinese people clearly understand that all their apparent "freedoms" now (to buy and sell stuff only) are not rights under the communists, but privileges granted by the dictators and able to be removed whenever needed to squash dissent.
Confucianism has a room for abuse because it puts the monarch as a father of the nation, to which filial piety is also extended. Children cannot kick out their father in Confucian teaching. Mencius advanced the idea of 'mandate of heaven' to fix this problem. Still, it is something which can be invoked as a last resort, because it implies dynastic change and ensuing chaos. It is not like firing your boss.
Chicoms try to revert to semi-dynastic rule via Politburo in order to survive. To bring them down could also require resurrecting another age-old idea, the rise of semi-religious or fully religious sect. A variation of Maitreya cult.