Based on the analysis of the relevant records of the contralateral bloodletting technique

it is believed that this needling technique has 3 key characteristics

including "contralateral selection of points"

"points on the four extremities dominated" and "collaterals selected rather than meridian points". Through the studies on philology and the annotation by the doctors in the past dynasties

a part of point prescriptions for the contralateral bloodletting is investigated

and those not belonged to the category of this needling technique in

Suwen: Miuci Lun

(

On Contralateral Bloodletting

) are distinguished. It is concluded that the failure of consensus-making in classifying point prescriptions is due to the lack of understanding on the characteristics of contralateral bloodletting and the misunderstanding on the errors of sentences and words. It is suggested that the study on theoretic concepts should lay on the problems relevant with the generalization and alienation of concepts. The mode of "combination of the detail with the whole" should be adopted. It starts from grasping the overall by systematic review

and followed by deliberating in details

so as to correctly identify the original concept and connotation.