for soft Qigong, our breathing is natural in and out through the nose... also when doing Siu Lim Tao too...
for hard qigong, we swallow air through the mouth down to the stomach and then breathe out thru the nose... it has a very different function on the body.
both are for different things specifically... do u have a qigong sifu? I'm guessing not if ur asking this question?
good luck
dawood
Peace is not the product of terror or fear.
Peace is not the silence of cemeteries.
Peace is not the silent result of violent repression.
Peace is the generous, tranquil contribution of all to the good of all.
Peace is dynamism. Peace is generosity.
It is right and it is duty.