In this video  Dr. Bear   (Mr. Iwashina Anryu), a widely acknowledged master from Morioka, Japan, established a classical rationale for working with the  teishin  (Chinese: dizhen), one of the nine classical needles described in the Ling Shu. This tool can be used to augment normal insertive filiform acupuncture needle techniques. The teishin can be used to tonify or to sedate points and regions.