The KPZ conjecture conjectures that the height function h ( t , x → → ) of all models in the KPZ universality at time t fluctuate around the mean with an order of t 1 / 3 and the spacial correlation of the fluctuation is of order t 2 / 3 . This motivates the so-called 1:2:3 scaling which is the characteristic scaling for the KPZ fixed point. The EW fixed point has also a scaling the 1:2:4 scaling. The fixed points are invariant under their associated scaling.