There are certain special connections between the back and the chest. Therefore, points on these opposing sides of the trunk often form a regular set of combinations. A well established example is the pairing of front-mu point and back' shu point, especially, the combination of the same zang or fu's back-shu and front-mu points. For example,
Feishu (BL13) -- (Lung) -- Zhongfu (LU1)
Xinshu (BL15) -- (Heart) -- Juque (RN14)
Ganshu (BL18 ) -- (Liver) -- Qimen (LR14)
Pishu (BL20) -- (Spleen) -- Zhangmen (LR14)
Shenshu (BL23)-- (Kidney)-- Jingmen (GB25)
Another important instance of the opposing anterior and posterior pairing is the combination of points on the Du channel and Ren channel. For example,
Zhiyang ( DU9 ) - Zhongwan ( RN12
Mingmen (DU4) Shenque ( RN8 )
Mingmen ( DU4 ) Guanyuan ( RN4 )
Chengjiang ( RN24 ) Fengfu ( DU16 )
In addition, relationships exist between the front and the back of trunk and are often paired. Such as:
Shenshu ( BL23 ) Huangshu (KI16)