Link the cup and the vacuum gun with the connecting tube. Lay the cup onto the breast with the scale on the cup upward for the convenience of putting down the position of the nipple reaching to the cup. Hold the cup which is on the breast with one hand and use the other hard pulling the lever of the gun to withdraw the air inside the cup so as to cause negative pressure of the cup, which may enlarge the breast some 2cm. Disconnect the cup and the connecting tube, gently lift the position located on the top of the cup to let air fill the cup. At the moment, the pressure inside the cup and outside the cup is equal, the cup would fall off the breast spontaneously and the breast resumes to the normal state, then put the cup onto the breast again, and withdraw the air. The breast enlarges once more, Repeat the procedure which moves the muscle and benefits blood circulation for 15minutes on each breast. Apply the treatment twice per day,  in the morning and in the evening. The flat and small breast will expand and throw out in a short term. It will eliminate your worry about flat chest, and keep you young and beautiful in body forever.