Saying “eu-eng-qing” is the way to open hunyuan qiao to harmonize the five inner organs qi and the whole body qi.
Hun yuan qiao (hun yuan palace) is the centre of the hun yuan qi of the inner organs.
It is very important for practice level three effectively. When saying “eu-eng” hunyuan qiao qi opens, when saying “qing”, qi gathers into hunyuan qiao. This is very good for a healthy life.
You can practice these sounds combined with Laqi in sitting and standing posture.