That's simply a buzzword that does not reflect reality. Australia has clauses all throughout its federal law restricting due process, especially for "terrorism" accusations. There are also no Miranda rights for crimes that can carry a penalty of more than five years.
Scanning the internet for examples of China being a rule-by-law country consistently presents opinion pieces, or opinion pieces by other names that seem little more than propaganda. China has many, many problems; but "rule by law" doesn't look very different from numerous places that would absolutely claim to be "rule of law"; and so, to me, it remains a propagandized term with a meaning that's used primarily against sets of rules and rulers we don't like.
I see your point, I am sorry to hear that you feel this way, you feelings are valid. As someone who moved from China to the US, I feel I can appreciate the difference a lot more, on a personal level.