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This refers to the egg cases of mantises on mulberry trees. A single mantis produces 9,900 offspring; using one case harms hundreds of lives, so it should not be used lightly. It inherits the Yin Qi (Yin Energy) of autumnal Metal and absorbs the fluids from mulberry leaves. Its taste is sweet and salty, its nature is neutral and non-toxic, with a thin Qi and strong flavor, belonging to the Yin category. It enters the Foot Shaoyin Kidney Meridian and the Foot Taiyang Bladder Meridian. Generally, humans regard the Kidney as the root. When men suffer from deficiency and damage in the Kidney Meridian, the Qi of the Five Zang Organs becomes weak, leading to impotence, nocturnal emission during sleep, or bedwetting. The salty flavor corresponds to Water and internally connects with the Kidney. When the Kidney receives this, Yin Qi grows, thus curing various diseases and benefiting essence for procreation. The Kidney and Bladder are interior-exteriorly related. When the Kidney is nourished, the Bladder naturally secures itself; when Qi transformation occurs, urine can be excreted, hence it promotes urination and relieves strangury. Women belong to Yin, and the Liver and Kidney meridians govern their physiology. Conditions such as hernia, mass formations (Zheng Jia), blood obstruction, and lower back pain are all diseases of these two meridians. Salty flavors benefit Yin, enter the Blood level, and soften hardness, thus treating these conditions. Sweet flavors tonify the Middle Jiao, thus treating damage to the middle Qi and boosting energy. When Kidney Qi is sufficient, water naturally ascends and interacts with the Heart, thus nourishing the Spirit. Collected in the second and third lunar months, steamed, and must be roasted over fire before use; otherwise, it causes diarrhea.

Sangpiaoxiao (Mantis Egg Case) treats male deficiency and decline of Kidney function, dispersion of Qi in the Five Zang Organs, hernia, mass formations, impotence, central lower back pain, seminal emission, white turbidity, benefits essence and strengthens utility, tonifies the middle and secures the Kidney, unblocks strangury and promotes diuresis, restores control over spontaneous urination, and is an essential herb in formulas for nocturnal emission. Long-term consumption boosts Qi and nourishes the Spirit, benefits essence for procreation, and also treats female blood obstruction, abdominal pain, and uncontrollable urinary incontinence before and after childbirth. Stir-fried with wine, ground into powder, and taken with warm water, it stops symptoms immediately, hence commonly known as "Jin Niao Ke" (No-Urine Nest), referring to the mantis egg case. Those from mulberry trees are best.

Baijing Qiuyin (Earthworm), inheriting the Yin Water Qi of the earth, corresponds to the Zhen Star of Water. Its taste is salty, its nature is cold, and it is non-toxic. Its profound coldness removes pathogenic heat and clears severe heat, thus treating latent corpses and ghostly infections (chronic infectious diseases), and mania/delirium caused by latent heat in Shanghan (Cold Damage). Salty flavors descend and promote urination, thus treating abdominal distension, jaundice, and parasitic masses, which are all painful conditions due to Damp-Heat. In ancient times, for febrile diseases causing mania, dozens of Baijing Qiuyin were crushed together with Jingjie Sui (Schizonepeta Spike) and the juice drunk, resulting in recovery through foul sweating. This verifies its efficacy in treating cold-lodging heat and mania. In recent times, decocted in wine, it is used to save those critically injured by falls or blows, ensuring bones and sinews remain uninjured and blood stasis resolves spontaneously—a truly miraculous formula. For blood-heat acne where spots are mostly purple-black, it is also valued. It utilizes the worm's ability to drill sharply into the earth and its momentum to travel through sinews and collaterals. Its salty flavor softens hardness, moistens downward, and dispels dampness. Entering dampness to exert its effect, blood heat and blood stasis dissolve upon contact, and accumulated fluid dissipates. This demonstrates how Yin-soft substances can restrain hyperactive Yang. For scrofula that has ulcerated and spread, wash with a decoction of the lower part of Jingjie roots; long-term use is beneficial. Where ulcers break open showing purple-black blood, prick with a needle to release blood. Wash three or four more times. Take a handful of earthworms from under leek beds at dawn (Wu Geng), roast red over charcoal carbon, grind to powder. Mix one spoonful with half a qian each of Rush Xiang (Frankincense), Mo Yao (Myrrh), Qing Fen (Calomel), and nine slices of Chuan Shan Jia (Pangolin Scale), roasted and ground. Apply mixed with sesame oil for miraculous effects. For sudden deafness and blockage of the ear, place earthworms in salt inside a scallion tube, let them melt into water, and instill drops for immediate effect.

Baijing Qiuyin treats severe heat and mania in Shanghan and Warm Diseases, inability to urinate, jaundice with dampness discharge, and traumatic injuries with miraculous efficacy. It also has remarkable effects on purple-black spots in smallpox/chickenpox.