According to TCM syndrome differentiation , 126 cases of grade 1 essential hypertension were classified into 4 types : liver-fire hyperactivity syndrome , yin-deficiency and yang-hyperactivity syndrome , excessive phlegm-dampness syndrome , yin-yang deficiency syndrome , and then the patients were randomly divided into a photoelectric combined with musical treatment group ( group A ) , an acupuncture group ( group B ) and a placebo group ( group C ) .