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According to the "Guangzhou Ji": It lives in the waters of Guangnan, with male and female distinctions. Its shape resembles a small mouse, and it roosts on banyan trees at night. One cast of the net yields two catches. According to the "Lingwai Lu": Its head resembles that of a toad, its back is covered with fine scales, its body is short, and its tail is long. It calls itself "Gejie" (Gecko) at dawn and dusk. Local people capture it, cut open its belly, prop it open with bamboo, dry it in the sun, and sell it in the market. The medicinal efficacy lies in the tail; those with incomplete tails are ineffective. People there use it to treat fractures and injuries. Recently, it has also appeared in the Western Route. Although small in size, its nourishing power is average, and it is non-toxic. It primarily treats upper qi (rebellious qi), hemoptysis (coughing up blood), and cough caused by Fei Wei (pulmonary flaccidity). It is suitable for use in pills and powders. When used, it should be roasted until yellow and cooked through, then pounded. If a small amount held in the mouth stops panting during running, it is authentic. (*Da Guan Ben Cao*, Vol. 22, p. 15; *Zheng He Ben Cao*, p. 447; *Ben Cao Gang Mu*, p. 1582)

According to the "Yi Zhi": It grows in the South Sea, with male and female distinctions, appearing blue-green in color, and resembling an almond kernel. To verify authenticity, first hold it in the mouth to warm it, then place it in vinegar. The male and female will chase each other and quickly join together, subsequently laying eggs like millet grains; this indicates authenticity. It primarily treats difficult labor in women. Holding it in hand facilitates delivery, proving highly effective. It is a rare item in the human world. (*Da Guan Ben Cao*, Vol. 21, p. 26; *Zheng He Ben Cao*, p. 436; *Ben Cao Gang Mu*, p. 1653)

According to the "Nanzhou Ji": Hai Can Sha (Sea Silkworm Sand) grows among rocks and stones in the mountains of the South Sea. Its form resembles a silkworm, about the size of a thumb. The sand is very white, resembling jade powder. It has distinct segments. It tastes salty and is greatly warm in nature, and non-toxic. It primarily treats deficiency exhaustion with cold qi and various wind syndromes causing inability to move limbs freely. Long-term consumption makes the person lustrous, tonifies deficiency and emaciation, lightens the body, and extends life without aging. Authentic ones are hard to obtain. Most are counterfeited by people using water to mix kudzu root starch (Puerariae Radix) and calcined stone, pressing comb teeth marks into them. These are not real; even if consumed, they offer no benefit and may harm the body. Use with caution. (*Da Guan Ben Cao*, Vol. 21, p. 26; *Zheng He Ben Cao*, p. 436; *Ben Cao Gang Mu*, p. 1522)