Crossing the river by feeling the stones, the introduction of combi-wall in China has been a gradual process, from shallow to medium, to now deep excavation. From small diameter casings and excavator mounted vibro’s, to large diameters and advanced resonance free vibro hammers like the ICE 36RF. Without noticing it, we have arrived in a new normal where diaphragm walls can be substituted for circular retaining walls.