The perfect rich man in the city

In addition to its rich and colorful colors, the most attractive thing about tourmaline is its polychromaticity.

When we hold the tourmaline and observe it at different angles by turning it against the light, the color tone and depth of the tourmaline will change with the different viewing angles.

This is due to the strong pleochroism of tourmaline, which also gives tourmaline a mysterious color.

The piezoelectric effect and pyroelectric effect of tourmaline. When the tourmaline is heated or pressured, or rubbed with silk or wool, an electrode effect will occur at both ends of the columnar tourmaline. One end will be positively charged and the other end will be negatively charged. This will cause the tourmaline to Attracting some dust or small scraps of paper, the magical power is the piezoelectric effect and thermoelectric effect of tourmaline, which is also the origin of the name"tourmaline".

Legend has it that on a warm summer day in 1703, in Amsterdam, several children were playing with stones brought back by Dutch voyagers.

Suddenly, a child discovered that these stones sucked up dust and grass clippings nearby. The children were very surprised and called their parents to see it. Sure enough, they found that this stone could attract or repel light objects, such as dust and grass clippings.

From then on, the Dutch called it smoke stone and used it to clean the soot in the pipe.

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I don’t know who this official hat belongs to.

It's not simple at first glance.

And behind them are peacock feathers.

This thing is a special antique.

In addition to this official hat, there is also a bus.

This bus is not particularly valuable.

Probably not as valuable as a luxury car.

But this bus can be used as a tourist bus.

When there are a lot of people, you can pick them up.

Many scenic spots have buses with free pick-up and drop-off.

Of course, it's definitely not worth it for one or two people.

Only the large number of people has the value of being used.

The third thing is a few ancient coins.

Ancient coins sprouted in the Xia Dynasty, originated in the Yin and Shang Dynasties, and developed in the Eastern Zhou and Qin Dynasties.

The cultural content of ancient coins is rich and colorful, which has been praised by people for thousands of years, and thus gave rise to a distinctive numismatic study.

The earliest ancient coins that appeared in China were"genus coins", which were real coins.

Earlier shells could only be considered currency.

Metal coins are bronze tools: from the Western Zhou Dynasty to the Spring and Autumn Period, due to the continuous improvement of bronze production technology, a large number of bronze production tools appeared. The importance of bronze tools already lies in the shells used as decorations, so in the process of exchange and trade, Some production tools such as knives, shovels, and yarn wheels have become general equivalents as means of circulation and payment.

Bronze tools replaced shells as currency for two reasons: first, because the actual number of shells used as currency was not large and could no longer cope with the increasing market demand. The second is because the practical value of production tools is greater than that of shells that can only be used as decorations.

From the Spring and Autumn Period to the Warring States Period, those bronze tools gradually evolved into bronze currency, because it was too bulky and inconvenient to exchange tools as general equivalents for market circulation.

People began to accept bronze coins shaped like tools. There were three main currency systems during the Warring States Period: cloth coins, knife coins, and ring coins.

There are three types of coins in Zhong Jing's hands, namely Banliang from the Qin Dynasty, five baht coins from the Han Dynasty and Kaiyuan Tongbao from the Tang Dynasty.

Zhong Jing didn't know how much this thing was worth.

But judging from the age, it should be quite a long time ago.

Qin Banliang coin was the currency system of the Qin State implemented throughout the country after Qin Shihuang unified the country. Gold was used as the upper currency, and the unit was yi, which was twenty taels. Copper coins were used as the lower currency, which was"half liang" money.

The reason why gold is a listed currency is that it is limited to large amounts of payment, such as rewards from emperors. In daily folk transactions,"half liang" money was used. The emergence of"half liang" money in the Qin Dynasty marked the entry of metal currency into a new period, that is, weight-bearing currency with unified weight name and currency name.

The five-baht coins of the Han Dynasty began to be minted in the fifth year of Yuanshou, Emperor Wu's reign, after the establishment of the Han Dynasty.

It was not until the Sui Dynasty destroyed the Tang Dynasty that the five-baht coin disappeared.

The five-baht coin is the longest-used and most successful coin in history. In terms of its weight, the five-baht coin is the standard currency. Even after Tang Wude announced to stop the use of the five-baht coin in the fourth year, the weight of the new money is still based on the five-baht standard.

Because they last a long time, the coins are not particularly expensive.

The last one is Kaiyuan Tongbao in the Tang Dynasty:"Old Tang Book·Shihuo Zhi" records:"(Tang) Emperor Gaozu still used the Sui Dynasty's five-baht coin. In July of the fourth year of Wude, the five-baht coin was abolished and Kaiyuan Tongbao was used. Money, eight cents in diameter, weighs two baht and four taels, accumulated ten coins weighs one tael, and one thousand coins weighs six catties and four taels."

"From then on,"money" became the unit of weight, and the decimal system of ten cents and one tael was born.

"Kaiyuan Tongbao often makes us think that it was cast during the Kaiyuan period of Emperor Xuanzong of the Tang Dynasty. In fact,"Kaiyuan" means"creating a new era";"Tongbao" means"traveling treasures in the country". The advent of Kaiyuan Tongbao coin ended Since the Western Han Dynasty, the tradition of naming coins after the weight of five baht has continued for more than 700 years, creating the Tongbao and Yuanbao money systems. Since the Tang Dynasty, coins have no longer been named by weight, but have been renamed"Bao", or Tongbao, or Yuanbao, or"Yuanbao". Or Chongbao, or some other treasure.

From the time when Kaiyuan Tongbao money was cast in the fourth year of Wude to the"Hongxian Tongbao" in 1916, the Tongbao and Yuanbao money system has been in use for nearly 1,300 years, and its long-term vitality has been Rare in the history of world currency._To read the ununderlined version of the novel, please download Feilu Novels