What is the motive for escaping from the ruins?

Don't be too busy watching, and run away when it concerns your own interests.

Fan the flames is a derogatory term in absolute sense, which comes from Sha Ting's "Clear Wave": I am not afraid of someone fanning the flames.

People who fan the flames are destructive. People who fan the flames always have their own ulterior motives, which are generally to harm others and benefit themselves, or to make each other fight to the death, or to use others as guns to sit and watch each other's fire and satisfy their psychological gloom.