<prompt> Principle for chinese medicine -YangVinBothNone  <response>: Ans. is c i.e., Both o Chinese medicine is based on two principles:- i Yang : Active masculine principle ii Vin : Negative feminine principle o The balance of these two opposing forces meant good health. o The Chinese were early pioneers of immunization. They practised variolation to prevent smallpox. o The Chinese system of bare-foot doctors and accupuncture have attracted worldwide attention in recent years. 