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The *Mingtang Xiajing* (Lower Classic of the Acupuncture Mounds) records: Since ancient times, when using moxibustion to treat diseases, it is taboo to use firewood from eight types of trees: pine (*Pinus*), cypress (*Cupressus*), zhi (*Ziziphus jujuba var. spinosa*), elm (*Ulmus*), jujube (*Ziziphus jujuba*), mulberry (*Morus*), bamboo (*Bambusoideae*), and others. One must strictly avoid these. There is a tool called "Da Zhu Yang Ri" (Great Pearl Reflecting the Sun); placing mugwort (*Artemisia argyi*) beneath it can ignite fire. Similarly, using a fire mirror to reflect sunlight can also ignite mugwort. These methods are all excellent. Various ethnic tribes use bin-tie (wrought iron) to strike kong-shi (flint), producing sparks which are then used to ignite mugwort. Ordinary people find it difficult to prepare such tools; therefore, it is better not to use wood fire, but rather to light a lamp with green hemp oil, burn the stem of mugwort on the lamp flame for point-moxibustion. This method moistens the moxa sore until it heals without pain. Using candles is even better. The *Liangfang* (Good Prescriptions) records: Whenever obtaining fire, one should strike stone to get fire (today, boatmen use a dull iron knife to strike stone, first creating fire in paper ash, with paper underneath to catch the spark). Or, use a crystal mirror to obtain solar fire under the sun, which is optimal. On cloudy days, one should use locust wood (*Robinia pseudoacacia*) to generate fire by friction.

When applying moxibustion, the base of the moxa cone should spread approximately three *cun* (Chinese inches) wide. If it does not reach this width, the acupoint will be inaccurate and not align with the meridians. This is because the flow of Ying-Wei (Nutritive and Defensive) Qi and Blood through the meridians has specific governing areas. If the moxa point is inaccurate, the heat energy cannot reach far enough, and the disease will not be cured.

When treating the head and four limbs, one should not apply excessive moxibustion. This is because the human body has 365 collaterals that all converge at the head, which is the meeting place of all Yang meridians. Excessive moxibustion here can cause dizziness, vertigo, and blurred vision. Since the muscles of the head and limbs are thin, simultaneous extensive moxibustion can cause stagnation and blockage of Qi and Blood. It is advisable to pause the application of heat for a short time to allow Qi and Blood to circulate freely again, then resume until the prescribed number of cones is completed. The disease will naturally be eliminated. This requires careful observation.

Since ancient times, eight types of wood fires have been taboo for moxibustion and must be avoided. Among these eight woods: Pine fire leads to non-healing and worsening of symptoms; Cypress fire damages the Spirit (*Shen*) and causes excessive sweating; Bamboo fire damages tendons and causes dim vision; Elm fire damages bones and leads to loss of will; Mulberry fire damages flesh causing emaciation; Jujube fire causes internal injury and hematemesis (vomiting blood); Zhe wood fire severely damages Qi and vessels; Orange wood fire damages Ying-Wei (Nutritive and Defensive) systems and meridians.

When treating the hairline: If the patient has a regular hairline, acupoints can be easily selected according to the *Mingtang*. However, if the patient lost their hair due to illness or was born without hair on the forehead or neck, it is difficult to rely on the hairline for point location. Currently, it is determined that the hairline is located three *cun* vertically above the midpoint between the two eyebrows. Posteriorly, the hairline is three *cun* vertically above the Dazhui (*GV14*) acupoint. This serves as the standard. The *Mingtang Shangjing* (Upper Classic of the Acupuncture Mounds) notes: Some individuals have long napes where hair grows down to the bone, while others lack a nape entirely, with hair ending level with the Tianyou (*TE16*) acupoint, having no root. How should points be located? The answer is: Hair growth cannot be rigidly fixed as a standard. Generally, it is so. If the Fengfu (*GV16*) acupoint position is confirmed, measure two *cun* distance from it; this determines the point.