Huangdi asked Qibo，“I love my people and provide for them. But I also levy taxes on them. I feel sympathy for them [because they are] unable to support themselves and frequently attacked by diseases. I don’t want to use herbs and needles to treat them• I am thinking of using the filiform needles to dredge their Channels，regulate their blood and Qi and adjust [the activities of] Ni (adverse)，Shun (due)，Chu (going out) and Ru (coming into) . To pass it on to the latter generations, it is nec¬essary to decide the principles [of acupuncture treatment] so that it can be kept forever and will never be lost. To make it easy to use and memorize, it is necessary to put it into good order and divide it into reasonable chapters [so as to] differentiate the in¬ternal from the external as well as to decide the starting and ter¬minating [points of blood circulation and Qi flow] . In order to describe the shapes [of different kinds of needles]，the Canon of acupuncture must be established first. [I’d] like to know [your ideas about] this issue.