[Wannabe]

I bought the kangzhu and the noogleberry... I used them for one month, but I have no swelling, no improvment.

I think you need to keep trying. It's quite clear from the experiences of the many users on this forum that the suction method does work. My suspicion is that you haven't found the right way to use them. Everybody's chest is a bit different so it could be that fit is tricky for you. I've found that larger diameter cups seem to work better that smaller. You really need to get the entire breast area of the chest into the cup. The size of the cup cone is less important as long as you create negative pressure inside. Keep trying things and I think you'll get the hang of it.