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For those who have accidentally swallowed copper, iron, or other metals, resulting in emaciation, it is advisable to consume fat lard along with mallow soup for several meals; the metals will then naturally pass down. This method is highly effective. For those who do not consume meat, Dweiwei Chengqi Tang (Regulate the Stomach and Purge the Intestines Decoction) should be used in a large dosage to induce purgation, which is also acceptable.

Regarding fish bones, wheat awns, bamboo or wooden splinters penetrating the throat, as well as hair mixed within the pharynx that cannot be swallowed, *Neijing* (The Classic of Internal Medicine) states: "Diseases arising from external factors are not caused by the movement of Qi." In such cases, a spell from the *Daozang Jing* (Canon of the Daoist Canon) can be employed.
The spell reads:
I request Laojun's eastward flow to be smooth,
Laojun, by imperial decree, commands and subdues,
Subduing the toxic waters,
I entrust myself to the Great Emperor's reverence,
Those who do not heed my call,
Each manifest the Emperor's form,
Act swiftly as per the law, by imperial decree, command and subdue.
After reciting the spell once in one breath, bend the middle and ring fingers of the left hand to form the Sanshan Seal (Three Mountain Seal), placing a cup of pure water upon it. Form the Jinqiang Seal (Golden Spear Seal) with the right hand using the Mao character gesture. The left hand is below, the right hand above; the left hand symbolizes Earth, and the right hand symbolizes Heaven. Perform the gestures of 'Xu Wan' and 'Zhuo' nine times as the standard posture. Stand with the left foot horizontal and the right foot vertical, forming a 'Ding' character stance. When performing the ritual, gaze at the sun, moon, or lamp fire, inhale one breath of Qi, and blow it into the cup. This method has no taboos. The key to its application lies in maintaining correct spiritual energy. Once the foreign object is expelled, do not immediately give rice soup or rice, lest rice grains enter the wound and cause suppuration. Instead, temporarily nourish the patient with flour-mixed soup for a few days.

For dog bites and snakebites, ointments and Shengji San (Flesh-Generating Powder) should not be applied immediately, as this would prevent the expulsion of toxic vapors. *Neijing* states: "Treat the interior first, then the exterior," which is appropriate. One should initially use Daoshui Wan (Water-Guiding Pill), Yugong San (Yu's Meritorious Powder), or Tongjing San (Unblocking Meridians Powder) to induce purgation more than ten times, after which pain and swelling will immediately subside. Subsequently, apply ointment and Shengji San for dressing, leading to recovery. This is the method of treating the interior before the exterior.

For injuries caused by various insects and beasts, as well as back sores, swellings, and toxins, or when Zhangchu (beating wounds) flare up or pathogens penetrate inward, Muxiang Binglang Wan (Aucklandia and Areca Nut Pill) can be taken, 70–80 pills up to 100 pills, or 150–200 pills, washed down with ginger decoction. After five to seven bowel movements, adjust the dosage according to the deficiency or excess condition.