0 - Peace 1 - Trade War 2 - Financial War 3 - Electronic War 4 - Shooting War
Note that 1 & 2 are different types of Economic war, and could be grouped together. The steps occur in order, but steps can be skipped.
From a US-centric point of view, North Korea and Iran seem to be at #3. China & Russia are at a limited version of #2.
Chinese/HK seem to be at #3 with each other.Given how invisible Electronic War can be, it's possible that they are deep in #3. It's also possible that #4 might be initially fought with HK Police forces as a proxy. Think of that as "4a".