In the acupuncture group , the needling technique for benefiting qi , promoting blood circulation , regulating mind and improving intelligence was used at Shenting ( GV 24 ) , Baihui ( GV 20 ) , Fengchi ( GB 20 ) , Wangu ( GB 12 ) , Danzhong ( CV 17 ) , Zhangwan ( CV 12 ) , Qihai ( CV 6 ) , Xuehai ( SP 10 ) and Zusanli ( ST 36 ) .