Objective To explore the effect of Jin's three-needle therapy, as an assistant treatment, in improving the intelligence of children with mental retardation (MR). Method Seventy-six MR patients were divided into a control group and an observation group, 38 cases in each group. The control group was treated with rehabilitation, while the observation group with JIN's three needle therapy plus the rehabilitation training. Prof. JIN Rui's 10-item observation index was adopted to evaluate the memory of the patients before and after the treatment...