Trial Q9 Free Practice Test Which points are especially useful for treating chronic bronchitis? A BL 28 (Pangguangshu) and DU 20 (Baihui) B BL 13 (Feishu) and LU 7 (Lieque) C ST 40 (Fenglong) and REN 12 (Zhongwan) D REN 17 (Shanzhong) and HT 7 (Shenmen)