International spread of virtual currency
1. bitcoin
the concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's ideas, open source software was designed and released, and the P2P network was built on it. Bitcoin is a kind of P2P digital currency. Point to point transmission means a decentralized payment system
2, Ethereum
Ethereum (ETH) is a kind of digital token of Ethereum, which is regarded as "bitcoin version 2.0". It adopts the blockchain technology "Ethereum", which is different from bitcoin. Developers need to pay for eth to support the operation of the application. Like other digital currencies, they can be traded on trading platforms
3. Litecoin
litecoin It is a kind of network currency based on "peer-to-peer" technology. It is also an open source software project under MIT / X11 license. It can help users make instant payments to anyone in the world
lightcoin is inspired by bitcoin (BTC) and has the same implementation principle in technology. The creation and transfer of lightcoin is based on an open source encryption protocol and is not managed by any central organization
Dogcoin, which is called dogcoin / dogcoin by some people, was born on December 8, 2013. Based on the crypt algorithm, dogcoin is the second largest virtual currency in the world after bitcoin in terms of the number of usersdigital currency is a global common currency initiated by non-governmental organizations. It does not belong to a certain country, but belongs to all mankind. It has the advantages of fast global transfer. For example, it can remit money from China to the United States in a few seconds, and the cost is low, and the total amount will not be increased at will like legal money, so the total amount is relatively stable
Yuanbao coin is a virtual digital currency similar to bitcoin. The founder of yuanbaocoin is a group of bitcoin enthusiasts and the earliest supporters. However, after seeing the problem of bitcoin, he decided to do his best to develop an electronic currency suitable for Chinese people with the latest technology Ppcoin was pre released by sunny king on August 11, 2012 and officially released on August 19, 2012. Ppcoin's biggest innovation is that its mining method combines POW workload proof and POS equity proof. POS mining method only needs ordinary computers and clients to process transactions and maintain network security, so as to achieve the purpose of energy saving and security Katecoin (KTC) is a virtual P2P digital currency that can be used all over the world. Point to point transmission means a decentralized payment systemin businesses that support Kat coin consumption, you can directly use Kat coin for consumption payment
8, quark money
based on six encryption algorithms (black, BMW, groestl, JH, keccak, skein), nine rounds of super secure hash operation of virtual money, three rounds of application of random hash function, quark money has unique technical specifications
9, infinity coin
infinity coin (IFC) is a new digital currency, which has more circulation advantages than bitcoin, and fills the short board of bitcoin in the field of commercial circulation and promoting commercial operation
one transaction of infinite coin needs three confirmations, each confirmation takes 30 seconds, and the transaction confirmation speed is very fast. Because bitcoin transaction needs 6 confirmations, which takes about 1 hour, and lightcoin transaction takes 15 minutes, infinite coin is used in daily common transactions, which is more practical
Common coin, English name popular coin, or POC, was born on March 7, 2014. The total POC is close to the world population (7.057 billion)POC is a super secure hash operation based on nine rounds of six encryption algorithms (Blake, BMW, groestl, JH, keccak, skein), which is suitable for CPU mining. It generates a block every 15 seconds, with a total of 7.057 billion (close to the world population)
extended data
virtual currency refers to non real currency. Well known virtual currency, such as network company's network currency, Tencent company's Q currency, Q point, Shanda company's voucher, Sina's Micro currency (used for micro games, Sina reading, etc.), chivalrous Yuanbao (used for chivalrous road game), silver pattern (used for bixue Qingtian game)
the popular digital currencies in 2013 are bitcoin, Leyte coin, infinite coin, quark coin, zeta coin, BBQ coin, pennies (Internet), invisible gold bar, red coin and prime currency. At present, hundreds of digital currencies are issued all over the world. Popular in the circle & quot; The legend of "bitcoin, Wright silver, infinite copper, pennies aluminum"
explain the situation with a simple example:
for example, the retail price of a watermelon in its procing area is 50 cents a catty. Here is not the wholesale price, but the price that people in the procing area buy when they want to eat a watermelon. So the watermelon in the city's high-end District supermarket selling price may be 1 yuan a Jin, why such a 5 Mao gap? In short, because of different locations, because the scarcity of watermelon is different
these virtual currencies may have different buying and selling prices on various platforms at any time, resulting in price differences in different regions.
first of all, make sure that the IP used by the computer is the public IP, so that any computer connected to the Internet can access the computer through this IP. Of course, most of the people at home and abroad use PPPoE to dial the Internet. They need to use a series of IP binding tools, such as peanut shell, to bind the IP after each dial, so as to achieve the purpose of real-time analysis. However, the bandwidth of most working families is between 2M and 8m, which is only suitable for 30 or 40 people to be online at the same time. If the number of visitors increases, it will lead to network congestion and unable to access
the second problem is continuous operation. The structure of the server is slightly different from that of the host computer. Because the server attaches great importance to stability, even the sound card is turned off by default, and the heat dissipation equipment is also "advanced". You can know from its "helicopter like roar", and the operating environment is also very luxurious, with 24-hour air conditioning, st-free, fire-proof, shockproof and so on. It also supports hot swap. The motherboard has more than 6 layers of PCB, and the power supply is rendant. It can be replaced without shutting down. The memory also has heat sink. However, the commonly used working home computer host does not have these conditions, and the configuration is not good, long-time work, it is likely to lead to high CPU temperature, running full, system failure
first of all, do you want to see if this project is air? Does the project side disclose detailed information, have a long-term plan, and do the coins they issue have real application scenarios
you see, for example, there are a lot of coins on defi now, and the project party is not clear. Even if it grows tens of thousands of times in a short period of time, from tens of u to hundreds of u, there is no practical application scenario, and it is inevitable that it will plummet to zero in the end
the most important thing is to see whether the project can realize the value of its own currency. This kind of thing is not just a matter of trading on the last exchange. Like ZZT, it supports the exchange procts, and supports the payment of hotels, gas stations and pharmacies in Tajikistan. With the implementation of these offline use scenarios, we can feel that the project party really wants to operate the currency, at least not a project to cut a wave of leeks and run away
secondly, take a look at their background, team, project white paper, online planning and so on. More research, more thinking, improve the level of certification, otherwise has been only leeks, cut by the project side.
each express company has different pricing for different weight of goods
if you want to take small goods and don't need time, I suggest you choose EMS (express mail service, which was founded by the Universal Postal Union) because the price is the cheapest
if you want to be fast, you can see which country, the United States, Canada, South America, and the United Kingdom. The fastest in these regions are ups (UPS was founded in the United States as a courier company in 1907) and DHL (Sinotrans DHL was founded by China foreign trade and Transportation Corporation and DHL Global Express in 1986)
but there is still a difference. For goods under 5.5kg, DHL is cheaper. For goods under 6kg to 21kg, UPS is much cheaper than DHL. From 21kg to 100kg, DHL is cheaper than ups. From 100
kg, ups will be cheaper than DHL
now let's talk about TNT. TNT is the largest express company in the Netherlands, and its customs clearance capacity in Western European countries is stronger than DHL, ups and EMS. But in terms of price, it is much more expensive than other companies. If you need to send some more important goods, but also fast, strong customs clearance, but not afraid of expensive words, I suggest you choose TNT
finally, FedEx, in Southeast Asia, can be said to be the top four companies, regardless of price or speed
the price of FedEx is equal to half of that of DHL and UPS, but the transportation speed is the same, so please choose FedEx when you send 21 kg goods to Southeast Asia
the disadvantage of FedEx is that Western Europe, the United States and Canada, South America, Africa and the Middle East countries do not have the advantage in price and speed. In the above mentioned places, that is to say, for general express companies, FedEx has the ability to improve the service quality
now there are many other express companies in our country, such as Middle East Express, Japan's Sasakawa express, Korea Sanyou express, Air France express, and Shunfeng express to Hong Kong. Their advantages are unmatched by several major express companies. They are all local leaders in their own countries (regions), No matter the price, speed and customs clearance ability, they are superior to the four major companies
as for the amount of customs declaration, I suggest that you do not report the value to US $30 when you declare. Because if the value is higher, your foreign consignees will pay a lot of customs ties. And in terms of customs clearance will be more strict, often hold the goods, and then let your recipient show the relevant commercial invoice. So you can find an experienced express company to declare for you. It is also necessary to add that the biggest reason why we have to report the value below US $30 is that the customs of Western European countries will be more strict in checking the value of US $30 on small pieces of goods
however, EMS is our Chinese Localization Company after all. I must tell you that the biggest advantage of EMS is that no other company can match it, that is, when your goods are detained abroad, EMS can help you to transport them back free of charge. If other big companies want to help you transport back, they will have to charge more freight for the goods transported back from abroad. Moreover, there is no discount and the price is too high to understand. Besides, the service quality of EMS is the worst. The first is that the transportation time is very unstable and the price is also very low. It often takes more than n days to go to developed countries, and the feedback of goods delivery information on the Internet is also very slow. After surfing the Internet, it shows that there is no news about the expected flight that day after it is sent abroad, and you can't find it by calling 11185. TNT, ups and DHL are relatively punctual in time, and the feedback of goods information is relatively fast. They usually feed back to their own company's website at the first time, so I strongly recommend DHL, TNT and UPS as the first choice when transporting valuables. Don't use EMS.