Is it larger than 100W? If not, and since you are not flying within the PRC, I am not aware of any significant new restrictions which determine whether a power bank can fly as cabin luggage.

What might be required is that the power bank not charge your phone (so I guess remove it on the plane), not be placed in the overhead compartment, have the capacity listed on the battery, etc.

The other thread on power banks lists (some of) the new regulations recently issued, many airlines seem to be aligning on a list of similar requirements (as above).