Rongyan is an earlier application of medicinal salt in ancient China。According to the source of salt and extraction method，Rongyan belongs to rock salt，is a kind of natural salt，It can be made naturally crystals。Qin and Han downs，Different historical periods are recorded in Rongyan。But for various reasons，The title of Rongyan has changed many changes in the long historical process，Even errors，To the Ming Dynasty Li Shizhen also caused confusion。This pair of cognitive Rongyan today、Application of Rongyan causes a lot of obstacles。So，Clarifying the title of "Rongyan" in different historical periods help better understand the value of Rongyan and discover the value of Rongyan medicine，Then better inherit and carry forward traditional Chinese medicine culture。

The Fifty -two Diseases unearthed from the tomb of the Ma Wangdui of the Western Han Dynasty is the earliest referring to Rongyan's medicine prescription，"Rongyan Ruomei Salt" records show that this medicinal salt grade is very high。The "Shennong Materia Medica" in the Eastern Han Dynasty summarized the effect of Rongyan for the first bet365 live casino games time，This reflects the medicinal value of Rongyan in the Eastern Han Dynasty.。In fact，Rongyan history should be more longer。Look at the occurrence time of the word "tired egg" in "Rongyan"，Rongyan is likely to enter the ancient Chinese pharmaceutical spectrum in the Eastern Zhou Dynasty。The Eastern Han Dynasty "Famous Doctor" describes the origin of Rongyan as Huyan Mountain、The southeast corner of the north and Jiuquan Fulu City，Another title of Rongyan Yin -Hu Yan。But "Rongyan" has a early due to an early occurrence，It is widowed by spreading。

Wei, Jin, Northern and Southern Dynasties，Rongyan gets a more systematic summary。Tao Hongjing once said "Rongyan、Bouring and salty must be used most "，Detailed description of nine "salt"，that is white salt、Salt、Black Salt、Hu Yan、soft salt、Red salt、Refutation of salt、Stinky salt、Horseta salt。But he compared the "Rong Salt" and "Big Salt" contained in the "Complex Note of the Materia Medica" with the medicinal salt at that time，Think "soft salt" may be "Rongyan"。In fact，In the "Wei Shu", there is a description almost the same as Tao Hongjing，Among them, it is clearly recorded that there is "Rongyan" without "soft salt"。Visible，"soft salt" in Nanliang is "bet365 live casino games Rongyan"。As for why the "Rongyan" of the Northern Wei Dynasty was transmitted to Nanliang "soft salt"，There are two possibilities: First, the title of nine salt appears errors in the dissemination from north to south，"soft" and "Rong" are similar to the pronunciation，"Rong Salt" is passed as "soft salt"; the second is the "soft salt" of "soft salt" indicates that the salt came from the northern Huns regime at the time -Rouran Khanate。Tao Hongjing's confirmation of "soft salt" is the "Rongyan" confirmation to avoid future generations and fall into the different cognitive misunderstandings of the two in the "Hu Yan" and "Rongyan" in the "Bencae Scriptures".。At the same time，Northern Wei Dao Yuan "Water Sutra" quoted "Wei Land" also records another title of "Rongyan "-" green salt "，This title is from Qingyanze, Shuofang County, Shuofang County。Extension to the Tang Dynasty，"Rihuazi Materia Medica" records another title of Rongyan -羌 salt，This is because the salt of Rongyan at this time is mainly produced in the place where the Qiang people in Northwest China。other，Tang Dynasty Rongyan was called "bald salt" in Shazhou，In Langzhou, it is called "Yin soil salt"，The characteristics of the two titles are obvious，It is not easy to cause confusion。But Bet365 lotto review the term "Rongyan" is always the most representative title。

Rongyan is called although more，The referred to as "Rongyan" is undoubtedly。What I saw at present，Only "stone salt" (light salt) is different from "Rongyan"。Northern Wei Dao Daoyuan divided "Rongyan" and "Shi Salt" in "Water Sutra"，This indicates that it does not think that Rongyan is stone salt，But the Tang Dynasty Lu Deming believed that "Rongyan" was "stone salt"，The main basis for judging is color。stone salt color white，According to Shui Jing Rong Salt、Large and green white、Bai Rongyan and other descriptions about the color of Rongyan know that Rongyan is colorful white。The description of the salt of the white salt after the Tang Dynasty。Bai Rongyan and other descriptions about the color of Rongyan know that Rongyan is colorful white，In the Song Dynasty, Kou Zongzheng also described in "Materia Medica Yiyi": "，such as pillow fine white，sweet and salty，Yigong is also blood。”

Dan Rong Salt、Is the same as the color of stone salt meaning the same substance? At the beginning of the Tang Dynasty, Sun Siyi said that "Guangming Salt" in "Thousands of Gold Wings" was the stone salt; Zhang Guo, a Taoist figure Zhang Guo, described "Chirong Salt is out of Xirong ... It tastes light bet365 live casino games than stone salt"，I also think that "Rongyan" is different from "stone salt"。But neither of the two is different。until the Ming Dynasty，Li Shizhen wants to use the color to clear the salt、Differences of stone salt。

Li Shizhen questioned the statement of Rongyan color white in "Compendium of Materia Medica"，It is believed that since the "Bencae Scripture Collection" records the characteristics of Rongyan production characteristics in Beihai Blue，South China Sea Red，Note on the past but white salt white，There must be errors in the meantime。He immediately quoted "Liangzhou Fortune" recorded "Red Salt is like Dan，Blacks like painting "to prove that Rongyan is not white，Then it is determined that "the white person is the light salt，and green salt、Red salt is salt "。In fact，Rongyan and Guangming salt (stone salt) are indeed the same salt，But Rongyan also has white，and the color salt may not be the salt。If Emperor Taiwu of the Northern Wei Dynasty gave Liu Yigong's nine kinds of salt "red salt" and "Rongyan" tied for，It is difficult to say that "red salt" is "Rongyan"。On the other hand, the description of the "white" of Rongyan in historical books is endless，It should be proved that there is indeed white salt。Even the Rongyan named "Green Salt" even if the Daoyuan bet365 best casino games Yuan said，It is also large but blue，It is not completely rejected the possibility of Rongyan as white。

So，Reasonable explanation or grade for Rongyan，Light color is high than the deep color of the color.。As the Tang Dynasty "Golden Stone Book Five Nine Nine Tips" described: "Rongyan，... Rongzhou，Color green and white on the top。Uncomfortable Ben，Who is true。This Tao is used，Trial of a salt with Hedong Pass，Rongyan wins all the salt。Both know this，Xu Guirong Salt。"" Those on the Blue White "，This can be seen that "Shui Jing Rong Salt" is a boutique of Rongyan。So，Based on the facts that the white salt appeared in history is mostly the facts enjoyed by the upper society，or inference this: Rongyan boutique，Crystal clear，like water essence，But ordinary people are unable to see; ordinary Rongyan has red、Black、Purple and other color，It is common for ordinary people for medicine。

(This article is the Study of the National Social Science Fund Project "Research on the Ming and Qing Salt Business Responsibility" (18BZS137) phased achievement)

(Author Unit: Marxism College of Xinxiang Medical College)