From my observations for years, I don't think the PLA, the CPC, and the PRC government views propaganda with the same kind of philosophy as westerners or even the ROC. I don't think they want to appear as a menacing, violent, or flashy. It is not to say that Chinese does not admire strength and martial prowess.
In my opinion, I think it has to do with the influence of Qing dynasty thinker Zeng Guofan (曾国藩), and his idea of "弃圆求缺", which means "abandon perfect fullness and embrace the existence of natural blemish/imperfection". I think this philosophical and aesthetic tradition affected the entire Chinese civilization after him. We see it everywhere in Chinese culture today. Including things like the common saying "土共(土鳖)不土,战斗力五", or the so-called "朴素美学".
And I think this is a very good and down to earth culture.