Why is Dr. Han sometimes so quiet when he is doing acupuncture?

During the treatment Dr. Han generally will not speak much because he is focusing his energy on moving the Qi in order to give you a more effective treatment.  If you are uncomfortable please speak up, otherwise if you have a question about the treatment or TCM please save your question until afterward and he can answer you in more detail then. Too much speaking will influence the movement of the Qi and can consume Qi which is less beneficial for the patient.