Yan Haoxiang's Drug-moving Therapies

Why a pill applying in Zusanli will help reduce the tumor in the esophagus and relieve dysphagia after a few days of local skin suppuration and infection?Why a pill applying in Gallbladder Meridian of Shaoyang will help reduce the tumor in the liver significantly? What is the reason?Does this have a similar effect as smallpox prevention by vaccine?Which on earth is taking effect, the pillor the immunization of lower he-sea point in the Yanglingquan of Zusanli?It's worth thinking!!!