Lung channel of hand taiyin, Chinese woodcut, Ming period

Diagram of the lung channel of hand taiyin, woodcut illustration from Xu Shi zhenjiu daquan, first published in 1439. The lung channel of hand taiyin is ruled by the eighth of the ten Heavenly Stems (xin) in conjunction with the third (bing). The lung draws blood.

Picture title: Shou taiyin fei zhi jing (The lung channel of hand taiyin). Other lettering: Xin day: in the mao time period (5:00 - 7:00 am) on a xin day, the lung channel opens at shangyang (Shang Yang) (variant/error for shaoshang (Lesser Shang), which is a well (jing) point with the attribute of wood. In the si time period (9:00 - 11:00 am) on a gui day, the kidney channel opens at ranggu (Blazing Valley), which is a spring (ying) point with the attribute of fire. In the wei time period (1:00 - 3:00 pm) on an yi day, the liver channel opens at linqi (Close to Tears), which is a stream (shu) point with the attribute of earth; and it traverses taiyuan (Great Abyss), which is the liver source (yuan) point. In the you time period (5:00 - 7:00 pm) on a ding day, the heart channel opens at sangu (error for lingdao [Spirit Path]), which is a well (jing) point with the attribute of metal. In the hai time period (9:00 - 11:00 pm) on a ji day, the gall bladder channel opens at lingquan (Mound Spring, which is a sea (he) point with the attribute of water. In the chou time period (1:00 - 3:00 am) on a xin day, blood is received at quze (Marsh at the Crook), which is a sea (he) point of the pericardium channel with the attribute of water. Xin corresponds to metal, and water is engendered by metal.