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The method of consuming the essence of the sun and moon from *Taishang Xuanzhen Jue*: The Lord Dongqing Siming said: My former master, Wang Jun, previously transmitted to me the *Taishang Mingtang Xuanzhen Shangjing*, requiring pure fasting (Qingzhai) and grain avoidance (Xiuliang), visualizing the sun and moon within the mouth. During the day, visualize the sun; at night, visualize the moon, making them as large as a ring. The sun is red with nine purple rays; the moon is yellow with ten white rays. By visualization, swallow them, consuming the fluid transformed from their radiant light, practicing secretly and frequently without limit. When not practicing visualization, the sun and moon reside in the Mingtang acupoint on the face, with the sun on the left and the moon on the right, allowing the two scenes to connect with the Qi of the Sun Child. This Dao allows for the collection and operation of vital essence, regulating spirits and ghosts, attended by the Six Ding deities and guarded by heavenly soldiers. This is the Way of the Highest Truths; the general mantras are essentially as follows.

Those who wish to consume the essence of the sun and moon should frequently eat bamboo shoots, as they are the embryo of the sun's Qi, also known as "Da Ming." They should also frequently eat dried bird meat, as it is the embryo of the moon's Qi—birds of the feather class, also known as "Yuelu." To consume the sun and moon, one should eat these substances, utilizing Qi resonance to transform them. The True Person Taixu said: "Hong" is the general name for birds of the feather class. Among them, hu, yan, e, and ou are all called Honglu.

Method of consuming solar Qi: Collect the solar brilliance at dawn (Pingdan), and practice visualization at midnight. Position it nine cun in front of the face, allowing myriad rays to illuminate your Niwan Palace, extending down to the five zang organs, penetrating the entire body. Guide the Qi into the mouth, where the light color becomes bright and splendid. Continue for a long time until completion, thereby attaining longevity.

Another method: At the time when Yang Qi begins to generate at midnight, or during the rooster's crow, lie straight with eyes closed. Generate the sun from the left eye and the moon from the right eye, each with a diameter of nine cun, positioned above both ears. The area above both ears is named the "High Window of the Six Directions." Let the light of the sun and moon shine upon the whole body, penetrating inward to the Niwan Palace and shining downward on the five zang organs. Within the intestines and stomach, everything can be perceived clearly, penetrating inside and out, merging the whole body with the light of the sun and moon. After continuing for a long time, click the teeth nine times and swallow saliva nine times, then silently chant: "Taishan Xuanyi, Jiuhuang spits essence. Three-five-seven cycles, penetrate the dark underworld. Sun and moon hang down light, reaching Shenming below. Illuminating the six directions, Taiyi brings peace. The Emperor's decree scroll, golden writing does not tilt. Five Elders present the talisman, heaven and earth test as one. Make me immortal, reaching true spirit. Repel ten thousand evils, disasters extinguished in the midst. Ascend to see the Heavenly Emperor, return to youth like an infant. The Supreme has decreed, hundred gods listen respectfully." Upon completion, open the eyes, refining the root and the souls of the Three Primordials through the sun and moon, to control and utilize the divine spirit, repelling invading ghostly Qi, thus achieving immortality. One should practice this visualization often.

Yet another method: Visualize the left eye as the sun and the right eye as the moon, combining in the divine night, then ascending into the Mingtang acupoint, forming the body of Huangying of life and death, flowing downward into the mouth, swallowing nine times to nourish Taiyi. Practice this visualization frequently during times when Yang Qi generates. Upon completion, silently chant: "Essence of the sun and moon above, yellow water and moon brilliance. Taiyi comes to drink, divine light hangs high. Make me live forever, sharing branches with heaven and earth." Practice this method for five consecutive days. The tongue and palate in the mouth constitute Shenming. After finishing the visualization of the sun and moon, move the tongue, feeling a spring-like liquid resembling purple-gold flow from the tongue, returning to the Mingtang, becoming the sweet nectar of Huangying. During visualization, keep the eyes closed and maintain the mental intention.