雷公云∶凡使，勿用 米，颗大无味。其 米，时人呼为粳 是也。若薏苡仁，颗小、
色青、味甘，咬着黏人齿。
夫用一两，以糯米二两同熬，令糯米熟，去糯米取使。
若更以盐汤煮过，别是一般修制，亦得。
雷公云∶凡使，不计多少，细锉，酒浸一宿，漉出，曝干，任用也。
雷公云∶远志凡使，先须去心，若不去心，服之令人闷。去心了，用熟甘草汤浸一宿，
漉出，曝干用之也。
雷公云∶凡使，采得后，阴干。欲使时，用铜刀切去髭、土、头，了，锉，于甘草汤中
浸一宿，至明漉出，曝干用。
勿空腹饵之，令人溺不禁。
雷公云∶凡使，一一拣去双叶，服之害人。须去头、土，了，用瓜水浸一宿，至明漉出
，曝干用之。
雷公云∶凡使，先去头、土，了，用酒浸一宿，漉出，于日中曝干，却，用酥蒸，从巳
至酉，却，徐徐焙干用。
石斛锁涎，涩丈夫元气。如斯修事，服满一镒，永无骨痛。
雷公云∶凡使，须用枸杞子汤浸一宿，待稍软，漉出，却，用酒浸一伏时，又漉出，用
菊花同熬，令焦黄，去菊花，用布拭令干用。
雷公云∶凡使，以布拭上肉毛，然后用浆水浸二伏时，漉出，于柳木火中焙干用。
若服此药得十两，不得食猪肉；若服至三年，不得食猪肉一生也。
Lei Gong said: When using Coicis Semen (Yiyiren, 薏苡仁), do not use the large, tasteless grains. These large grains are what people at that time called Jingmi (Japonica Oryzae Semen, 粳米). True Coicis Semen has small grains, is greenish-white in color, tastes sweet, and sticks to the teeth when chewed.
If one ounce of Coicis Semen is required, boil it together with two ounces of Glutinis Oryzae Semen (Jingmi, 糯米) until the glutinous rice is cooked. Discard the glutinous rice and use only the Coicis Semen.
Alternatively, boiling it in salt water constitutes a different special processing method, which is also acceptable.
Lei Gong said: For Ligustri Ramulus et Folium (Luoshiteng, 络石藤), regardless of the quantity, finely chop it, soak it in wine overnight, strain it, dry it in the sun, and it is ready for use.
Lei Gong said: For Polygalae Radix (Yuanzhi, 远志), the heart must be removed first. If the heart is not removed, ingestion will cause chest stuffiness. After removing the heart, soak it in decoction of prepared Glycyrrhizae Radix et Rhizoma (Gancao, 甘草) overnight, strain it, dry it in the sun, and use it.
Lei Gong said: For Dendrobii Caulis (Shihu, 石斛), after harvesting, dry it in the shade. When preparing for use, cut off the roots, soil, and head with a copper knife, chop it, soak it in Glycyrrhizae Radix et Rhizoma (Gancao, 甘草) decoction overnight, strain it the next morning, dry it in the sun, and use it. Do not take it on an empty stomach, as it may lead to urinary incontinence.
Lei Gong said: For Gnaphalii Herba (Tianmingjing, 天名精), carefully pick out plants with double leaves, as they are harmful if ingested. Remove the head and soil, soak in melon juice overnight, strain it the next morning, dry it in the sun, and use it.
Lei Gong said: For Epimedii Folium (Yinyanghuo, 淫羊藿), first remove the head and soil, soak in wine overnight, strain it, and dry it in the sun. Then steam it with butter from Si hour to You hour (approx. 9 AM to 7 PM), and finally slowly bake it dry. Dendrobii Caulis (Shihu, 石斛) locks fluids and astringes male vitality. However, processed Epimedii Folium (Yinyanghuo, 淫羊藿) like this, if taken for a full yi (ancient weight unit), will permanently prevent bone pain.
Lei Gong said: For Lycii Fructus (Gouqizi, 枸杞子), soak in Lycii Fructus (Gouqizi, 枸杞子) decoction overnight until slightly soft. Strain it, then soak in wine for one shichen (approx. 2 hours), strain it again, and simmer it together with Chrysanthemi Flos (Juhua, 菊花) until scorched yellow. Remove the Chrysanthemi Flos (Juhua, 菊花), wipe dry with cloth, and use it.
Lei Gong said: For Clematidis Radix et Rhizoma (Weilingxian, 威灵仙), first wipe off the fleshy hairs with cloth, then soak in fermented grain water for two shichen (approx. 4 hours). Strain it and bake it dry over willow wood fire. If taking ten taels of this herb, pork must not be consumed; if taken for three years, pork must never be consumed for life.
Lei Gong said: After harvesting, rub off the hairs on the leaves and stems with coarse cloth. Soak in decoction of prepared Glycyrrhizae Radix et Rhizoma (Gancao, 甘草) for one shichen (approx. 2 hours), take out, slice, dry in the sun, and it is ready for use.