... and reflect your personalized signs, when you see a, for the flowers and plants design series in ... specific patterns, please specifyBasic knowledge:Whether Gu Xun is a four hole, eight hole, six or twelve hole ... the blowing nozzle block, with the tip of a site.Three, tonguing:To tie in with your tongue out ... of second knuckle filed, the finger is a little like a grasping action.Five, blowing Gu Xun:Gu ...