MCM Wing Chun Chi Gong Set and the 4 powers. 沉、浮、咽、吐 Chén, fú, yàn, tǔ 

a short set of movements using circular movements with a short burst of energy. Developing the 4 powers. ( Sink, Float, Swallow, Spit ) 沉、浮、咽、吐
Chén, fú, yàn, tǔn