（本经上品）
【气味】甘酸寒，无毒。
【主治】主青盲，耳聋，明目，利九窍，通血脉，养精神，益肝气。久服轻身延年。
【核】曰∶出益州山谷，及越 山，今蔚、兰、宣、梓诸州亦有。产上饶，似钟乳石，
片片含紫色光彩者佳，次则蜀严道，及北代山者亦好。玉洞要诀云∶空青受庚辛赤金之精，
甲乙阴灵之气，多近名泉，久而含润。初从坎中出者，其内有水如浆，味颇甘酸，经久即干，
如连珠，金星灿灿然。庚辛玉册云∶多生金坎中，生生不已，故青为之丹。有如拳大，及卵
形者，乃得空中，有浆如油，出铜坑者亦佳，止堪作画。又有石青、杨梅青，皆是一体，而
质有精粗。点化以曾青为上，空青次之，杨梅青又次之。但圆实如珠者，不堪用也。修事，
各随方制，酒浸醋拌，制过乃可变化。畏菟丝子。
绍隆王先生云∶色青法木，故可入肝。功能明目，肝主开明于目故也。然瞳子神光，专
司在
【 】曰∶空青黄赤金矿之精粹也。盖五行金位于西，黄为五金土，赤为五金火也。造
化指南云∶紫阳之气生绿，青阳之气生青，空青者，石绿之得道者也。黄帝云∶青阳走上窍，
盖肝窍目，故益肝，明目清盲，并利九窍也。通血脉者，诸脉皆属于目也；养精神者，心藏
神，肾藏精，藉金木之交互，火水之合璧也。然则空青以功用诠名矣。
[Classified as Upper Grade in the *Shennong Bencao Jing*]
【Flavor and Nature】Sweet, sour, cold, non-toxic.
【Indications】Primarily treats Qingmang (visual impairment or blindness), improves deafness, brightens the eyes, unblocks the Nine Orifices (the nine openings of the head and face), promotes blood circulation, nourishes the spirit, and benefits Liver Qi. Long-term consumption lightens the body and prolongs life.
【Verification】It is stated: Kongqing originates from the valleys of Yizhou and Yuexue. Currently, it is also produced in Weizhou, Lanzhou, Xuanzhou, and Zizhou. The Kongqing produced in Shangrao resembles Zhongruishi (Stalactite); those that are flaky and contain purple luster are considered superior. Those from Yandao in Shu and Beidai Mountain are also good. The *Yudong Yaojue* states: Kongqing receives the essence of Geng-Xin Metal and Red Metal, along with the Yin spiritual energy of Jia-Yi. It is often found near famous springs, retaining moisture over time. When first extracted from Kan (North/Water element), it contains liquid inside like broth, tasting sweet and sour; after a long period, it dries out, resembling linked pearls with shining golden stars. The *Gengxin Yuce* states: It grows mostly within Jin-Kan, generating endlessly, thus turning green into cinnabar red. Some are fist-sized or egg-shaped, having obtained the hollow air, containing liquid like oil; those from copper pits are also excellent but only suitable for painting. There are also Shiqing (Malachite) and Yangmeiqing (Bayberry Green), which are of the same origin but differ in texture refinement. For alchemical processing, Zengqing is best, Kongqing is second, and Yangmeiqing is third. However, those that are solid and round like beads are unusable. Processing methods vary according to prescriptions: soaked in wine, mixed with vinegar, and processed before it can undergo transformation. It opposes Tusizi (Cuscutae Semen).
Mr. Wang Shaolong said: Its green color corresponds to Wood in the Five Elements, so it enters the Liver meridian. Its function is to brighten the eyes because the Liver governs vision. However, the divine light of the pupil is specifically governed by...
[ ] states: Kongqing is the essence of Yellow-Red Copper Ore. Generally, Metal is located in the West in the Five Elements; Yellow represents Earth among the five metals, and Red represents Fire among the five metals. The *Zaohua Zhinan* states: Zi Yang Qi generates Green, Qing Yang Qi generates Cyan. Kongqing is the enlightened form of Shilv (Green Stone). The Yellow Emperor said: Qing Yang Qi ascends to the upper orifices. Since the Liver opens into the eyes, it benefits the Liver, brightens the eyes, clears blindness, and unblocks the Nine Orifices. Promoting blood circulation occurs because all meridians connect to the eyes; nourishing the spirit occurs because the Heart stores Shen (Spirit) and the Kidney stores Jing (Essence), relying on the interaction of Metal and Wood, and the union of Water and Fire. Thus, Kongqing is named according to its functions.