In the yin-yang needling group , the acupoints of yin meridians such as Zuwuli ( LR 10 ) , Xuehai ( SP 10 ) , Yinlingquan ( SP 9 ) and Sanyinjiao ( SP 6 ) , etc. and the acupoints of yang meridians such as Biguan ( ST 31 ) , Liangqiu ( ST 34 ) and Yanglingquan ( GB 34 ) , etc. were selected .