Did you know Monkey’s early spiritual training in chapter one is connected to historical Daoist internal alchemy? After becoming a student of the great immortal Subhuti in India, Sun receives a private lesson in which his master recites an instructional poem, part of which reads:
All power resides in the semen, breath, and spirit;
Store these lest there be a leak. Lest there be a leak!
Keep within the body!
Heed my teaching and the Way itself will thrive
You can plant gold lotus e’en in the midst of flames.
Squeeze the Five Phases jointly, use them back and forth—
When that’s done, be a Buddha or immortal at will! (Wu & Yu, 2012, p. 120).
The cryptic methods advocated in the poem find their origins in dogmatic Daoist internal practices that emerged during the Song Dynasty (960-1279) (Kohn, 2008, p. 177). When Subhuti warns Monkey to “Store these [bodily substances] lest there be a leak”, he is referring to the first of three stages in the forging of an immortal spirit body. It involves transforming chaste semen (jing, 精) into pneumatic energy (qi, 氣) and guiding it to the brain, where it is purified and then circulated throughout the body, resulting in the formation of a spiritual pearl in the Cinnabar Field (dantian, 丹田), or the body’s spiritual furnace located in the lower abdomen (Kohn, 2008, p. 178). “You can plant gold lotus e’en in the midst of flames. / Squeeze the Five Phases jointly, use them back and forth” refers to the second stage, involving the inhalation and guidance of yang energy through various organs (the “five phases”) in the body to bolster the spirit (shen, 神) (fig. 1). This nurturing of the pearl causes it to sprout like a seed and blossom into a golden lotus (“amidst flames”) in the spiritual furnace. The lotus is considered the early stages of an immortal spirit embryo (Kohn, 2008, pp. 178-179). The third stage involves the nurturing of said embryo to maturation with spiritual energies and eventually guiding it upwards and out the Heavenly Gate (tianguan, 天關), or the top of the crown. This results in a fledgling immortal spirit body that must be trained over an additional three year period in which it learns to travel far and wide apart from the physical vessel (pp. 179-180). “When that’s done, be a Buddha or immortal at will!” refers to the eventual freedom of the immortal spirit.
Fig. 1 – (Left) A diagram of the organs and energy path-
ways in the human body (larger version). Fig. 2 – (Right)
A daoist sage subduing a tiger with his magic powers
(larger version). Photos from Kohn (2008).
Kohn (2008) notes that adepts who succeed in their training gain supernatural powers, “including the ability to be in two places at once, to move quickly from one place to another, to know past and future, to divine people’s thoughts, and so on” (p. 180)(fig. 2). I feel this is important information considering all of the powers that Monkey exhibits throughout the story.
Although dogmatic internal alchemy emerged during the Song, various facets of the practice, such as the breathing methods from stage two above, have a much older pedigree. JTTW describes Sun secretly performing “breathing exercises before the hour of Wu and after the hour of Zi” (before noon and after midnight).  This time-based practice is described in the fourth-century CE work Wondrous Record of the Golden Casket on the Spirit Immortals’ Practice of Eating Qi (Shenxian shiqi jin’gui miaolu, 神仙食氣金櫃妙錄): “always practice after midnight [and before noon] in the period of living qi [yang energy] … In this qi-practice, the time after noon and before midnight is called the period of dead qi [yin energy]. Do not practice then” (Kohn, 2008, p. 84).  So by practicing during the prescribed hours, Monkey absorbs the yang energy that he needs to forge his immortal spirit body.
1) The original source says “breathing exercises before the hour of Zi and after the hour of Wu” (Wu & Yu, 2012, p. 121). I’ve changed the quote because this is most likely an error. See below.
2) There is a glaring contradiction between what the novel says (before Zi and after Wu) and what Daoist practice prescribes (before Wu and after Zi). I think this is a transcription error in the original text.
Kohn, L. (2008). Chinese healing exercises: The tradition of Daoyin. Honolulu: University of Hawaiʻi Press.
Wu, C., & Yu, A. C. (2012). The journey to the West: Volume 1. Chicago, Illinois : University of Chicago Press.