赤石脂、花蕊石、卢甘石、轻粉俱细研飞，各五钱，象皮略炙研粉，乳香、没药各三钱，冰片二钱，麝一钱，
黄蜡、白蜡各一两，麻油四两。先将麻油煎沸，次入黄白蜡，次乳没，次三石，退火，下轻粉、象皮，待冷入片、
麝，研匀。过硬加熟猪油。治一应疮疡，日久溃烂，不生肌，不合口，神效。
经曰∶气伤痛，形伤肿。又曰∶先痛而后肿，气伤形也。先肿而后痛，形伤气也。凡人毒发肿痛，责以形气
两伤。然在皮肤某经某络，外可直指，投药刻期能愈。故是科分道扬镳，在处不乏人。今曰日久溃腐，及大病已除，
只肌冷湿淫，未易敛口，爰用石脂、甘石、花蕊、轻粉解毒以除湿，乳香、没药、冰、麝、麻油温肌以行湿，象
皮、黄白蜡固卫以止湿，如此日换一纸，不数旬准痊。
上方本外科收功善后之药，录入本经，盖夹拳毛痂落，涂脸上能灭瘢，及因毒漏睛、痰核，砭灸皮烂，久久
而不愈者。
水银、牙硝、白矾各一两，将硝矾研细，置锅内，轻轻放水银于中央，青瓷碗覆盖，上镇以重器，用 过石
膏八两，研筛，醋调略湿，傍碗口周遭填实，勿令泄气，然后打叠炭火，好生安顿炉上，听火自红，稍烬加炭急
鼓，觉锅与碗热甚，去上压之器，泻火于碗HT 干二三次住火，其药上升成丹。
上丹世呼三仙，能办理者亦众，但火候升打不同，故奏效微有迟速，颜色亦红黄不等。解毒收湿，推陈致新，
用涂拳毛、夹落溃腐，及漏睛、烂弦、因毒等症，雅有神通。谨遵前法烹炼，丹成精光夺目，肯降以治疮疡，功
不在专医之下。乃更其名曰景云根。
赤石脂、花蕊石、卢甘石、轻粉均需细细研磨并飞制，各取五钱；象皮略加炙烤后研磨成粉；乳香、没药各三钱；冰片二钱；麝香一钱；黄蜡、白蜡各一两；麻油四两。先将麻油煎至沸腾，接着加入黄蜡和白蜡，再加入乳香和没药，随后加入三种石类药物，待退去火气后，加入轻粉和象皮粉，待药液冷却后，最后加入冰片和麝香，搅拌均匀。若药膏过硬，可添加熟猪油调节。此方治疗各种疮疡，日久溃烂、肌肉不生、伤口不愈合者，效果显著。
经典记载：气机受伤导致疼痛，形体受伤导致肿胀。又说：先痛后肿，是气伤及形；先肿后痛，是形伤及气。凡是人体毒邪发作引起肿痛，都归因于形与气同时受损。然而，如果病位在皮肤某条经络，外部可以明确指出，用药后短期内即可痊愈。因此，这一科（外科）发展出不同的流派，各地不乏擅长此道之人。如今遇到病程长久、溃烂腐坏，或者大病已除，但仅余肌肉冰冷、湿气浸淫，难以收敛闭合的情况，于是使用赤石脂、卢甘石、花蕊石、轻粉来解毒以祛除湿邪，乳香、没药、冰片、麝香、麻油来温煦肌肉以行散湿气，象皮、黄蜡、白蜡来固护肌表以止住湿气，如此每天更换一张药纸，不出数十天即可痊愈。
上述方剂原本是外科用于收功善后的药物，录入本经，大概是因为拳毛痂脱落、涂抹面部能消除疤痕，以及因毒邪导致的漏睛症、痰核，经过砭刺灸法后皮肤破损，久久不能愈合的情况。
水银、牙硝、白矾各一两。将牙硝和白矾研细，放入锅内，轻轻将水银置于中央，用青瓷碗覆盖，上面用重物镇压，用过石膏八两，研磨过筛，用醋调制成微湿状态，围绕碗口周围填实，不要泄漏气体，然后整理炭火，稳妥地安置在炉上，听任火焰自然变红，稍有余烬时加入炭火并急鼓风，感觉到锅与碗非常热时，去掉上面的压物器，将药液泻入碗中，重复加热干燥两三次后停止加热，药物上升凝结成丹。
这种丹药世人称为“三仙”，能够炼制的人也很多，但火候和升打的方法不同，所以见效速度略有快慢，颜色也有红黄不等。此丹能解毒收湿，推陈出新，用于治疗拳毛、夹睑溃烂腐坏，以及漏睛、烂弦、因毒等症状，具有神奇的功效。严格遵循前法烹炼，丹药成品精光夺目，愿意用它来治疗疮疡，功效不亚于专门的外科医生。于是给它起名叫“景云根”。
Chishi Zhi (Halloysitum Rubrum), Huarui Shi (Calamites), Lugan Shi (Plumbum Carbonicum), and Qingfen (Calomelas) are all finely ground and levigated, each taking five qian; Xiangpi (Elephant Skin) is slightly roasted and ground into powder; Ruxiang (Olibanum) and Moyao (Myrrha) each take three qian; Bingpian (Borneolum Syntheticum) takes two qian; Shexiang (Moschus) takes one qian; Huangla (Cera Flava) and Baila (Cera Alba) each take one liang; Mayou (Semen Sesami Oleum) takes four liang. First, boil the Mayou until bubbling, then add the Huangla and Baila, followed by the Ruxiang and Moyao, then add the three types of stone minerals. After removing from heat to dissipate the fire energy, add the Qingfen and Xiangpi powder. Wait for it to cool, then add the Bingpian and Shexiang, and grind uniformly. If the ointment is too hard, add cooked Lard (Su Zhuyou). This formula treats various sores and ulcers that have been ulcerated for a long time, with non-healing granulation tissue and unhealed wounds, showing miraculous efficacy.
The Classics state: Qi injury causes pain, Form injury causes swelling. It also states: Pain first followed by swelling indicates Qi injuring the Form; Swelling first followed by pain indicates Form injuring the Qi. Whenever toxic pathogens erupt causing swelling and pain, it is attributed to simultaneous injury of both Form and Qi. However, if the disease is located in the skin or specific meridians and collaterals, it can be pointed out externally, and medication can lead to cure within a short period. Therefore, this specialty (External Medicine) has branched into different schools, with many practitioners everywhere. Now, regarding cases where ulceration and putrefaction persist for a long time, or after major illnesses have been eliminated, but only cold muscles and dampness infiltration remain, making wound closure difficult, we use Chishi Zhi, Lugan Shi, Huarui Shi, and Qingfen to resolve toxicity and remove dampness; Ruxiang, Moyao, Bingpian, Shexiang, and Mayou to warm the muscles and circulate dampness; Xiangpi, Huangla, and Baila to consolidate the defensive layer and stop dampness. By changing a paper dressing daily, recovery is expected within a few weeks.
The above formula was originally an external medicine used for concluding treatment and follow-up care. It is recorded in this classic, likely because when applied to the face after the falling off of eyelash crusts (Quanmao Jia), it can eliminate scars, and for conditions such as leaking eyes (Lou Jing) due to toxins, phlegm nodules (Tan He), or skin damage from beadling and moxibustion that fails to heal over time.
Shuiyin (Mercurius), Yaxiao (Natrii Nitratis Crystallis), and Baifan (Alumen) each take one liang. Grind the Yaxiao and Baifan finely, place them in a pot, gently place the Shuiyin in the center, cover with a green porcelain bowl, weigh down with heavy objects, prepare eight liang of Guoshi Gypsum (Gypsum Fibrosum), grind and sieve it, mix with vinegar to a slightly moist consistency, fill tightly around the rim of the bowl to prevent gas leakage. Then arrange charcoal fire, place securely on the stove, allow the fire to turn red naturally, add charcoal and vigorously bellows when embers fade slightly. When the pot and bowl feel very hot, remove the weights, pour the substance into the bowl, repeat heating and drying two or three times, then stop the fire. The medicinal substance rises and condenses into Dan (Elixir).
This Dan is commonly known as Sanxian (Three Immortals). Many people know how to process it, but due to differences in fire control and sublimation methods, the speed of effect varies, and colors range from red to yellow. It resolves toxicity, absorbs dampness, eliminates the old, and generates the new. It is used to treat conditions such as eyelash issues, ulcerated and putrid edges of the eyelids, leaking eyes, rotten eyelid margins, and toxin-induced symptoms, possessing spiritual efficacy. Strictly following the previous method of cooking and refining, the resulting Dan shines brilliantly. Those willing to use it to treat sores and ulcers achieve merits not inferior to specialized surgeons. Thus, it is renamed Jingyun Gen.