Shanfan chain heavy miner coin
bitcoin is a fraud, so we must be cautious in investment and financial management
even if it is called "hard currency", the price of gold will not only rise but not fall. There is no bubble in gold, but the price is too high, there is a bubble, and the bubble will eventually burst, such as virtual currency such as bitcoin. The more general virtual currencies, the closer bitcoin's value is to zero
this kind of currency, which is a purely calculated digital symbol, has no asset support, no financial revenue and expenditure, no cash reserve and no use value. It is only a circulation symbol. Once it loses its credit guarantee, it is a pile of beautiful printed waste paper. Investors should be alert that there is no so-called safe investment in this world, and all investments are risky
the people's Bank of China and other departments issued a document to severely punish the above-mentioned behaviors, making it clear that token trading is not protected by law. With some virtual currency trading platforms turning to overseas, speculative money speculation has also turned to "underground". In the face of continuous renovation, on the basis of continuous strict supervision, government departments should constantly upgrade the means and ability of supervision, and continue to increase publicity and crackdown on popular science, so as to avoid the masses being deceived
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investing in virtual currency is more of a kind of speculation. Investors should strengthen their risk prevention awareness and identification ability. Without confirming the identity of the other party, they should not be involved in money transactions, trust low-risk and high return investment procts, especially not join the investment and financing group without verification, These are often well-designed traps by telecommunication network fraudsters
it's better to purchase the investment and financial management accompanied by the children, and learn from the official and authoritative channels, and report to the police in time when they are found to be cheated. Properly protect all kinds of account password, identity information, etc., don't tell others easily. Any reference to the need for transfer and remittance should arouse high vigilance and consult with trusted acquaintances
reference source: people's.com - uncover the crazy bitcoin: new Ponzi scheme of 800 yuan each<
People's website - three men set up bitcoin scam and made a profit of more than 150000 yuan and were sentenced
People's website - People's website comments on "analytic blockchain" part 3: how to avoid getting away from the real to the virtual
public key system: corresponds to a public key and a private key, keeps the private key in the application and publishes the public key. When Party A transmits information to Party B, it can use Party A's private key to encrypt the information, and Party B can use Party A's public key to decrypt the information, so as to ensure that the third party cannot impersonate Party A to send the information; At the same time, when Party A transmits information to Party B, it is encrypted with Party B's public key and sent to Party B, and then Party B decrypts it with his own private key, so as to ensure that the third party cannot eavesdrop on the communication between the two people. RSA is the most common public key system, but the lliptic curve digital signature algorithm is used in bitcoin protocol. What's the difference between cash and bank account? Bitcoin is an electronic currency in BTC. In this article, it is also used to refer to the whole bitcoin system. Like opening an account in a bank, the corresponding concept in bitcoin is address. Everyone can have one or more bitcoin addresses, which are used to pay and collect money. Each address is a string that starts with 1. For example, I have two bitcoin accounts, and. A bitcoin account is uniquely determined by a pair of public key and private key. To save the account, you only need to save the private key file. Unlike bank accounts, banks keep all transaction records and maintain the book balance of each account, while bitcoin's transaction records are jointly maintained by the whole P2P network through a pre agreed protocol. How much money is in my account address? Although the current account balance can be seen by bitcoin software, unlike banks, there is no place to maintain the book balance of each address. It can only calculate the account balance in real time through all historical transactions. How do I pay? When I pay from address a to address B of the other party, the payment amount is e. at this time, both parties will announce the transaction information to each network node, telling address a to pay to address B, and the payment amount is e. In order to prevent the third party from forging the transaction information, the transaction information will be encrypted with the private key of address A. at this time, the network node receiving the transaction information can use the public key of address a to verify that the transaction information is indeed sent by address a. Of course, trading software will help us do these things, we just need to input the relevant parameters in the software. What will the network node do after receiving the transaction information? This is the most important part of the bitcoin system, which needs to be elaborated. For the sake of simplicity, only bitcoin protocol has been implemented. In the current version, each network node will save all transaction information synchronously. There are two kinds of transaction information in history, one is & quot; Verified & quot; The transaction information, that is, the verified transaction information, is stored in a series of "blocks". Each & quot; block" Is the previous & quot; bock" The ID of each block is the hash code of the hash code of the block and the new transaction information (see an actual block). The other category refers to those who also & quot; Unverified & quot; The transaction information just paid above belongs to this category. When a network node receives new unverified transaction information (possibly more than one), it can calculate the book balance of each address at that time because the node keeps all the transaction information in history, so it can calculate whether the transaction information is valid, that is, whether there is enough balance in the payment account. After eliminating the invalid transaction information, it first takes out the last & quot; block" Then, the unverified transaction information is combined with the ID, and a verification code is added to form a new "block". It needs a lot of calculation to build a new block, because it needs to calculate the verification code, so that the above combination becomes a block, that is, the first several bits of the hash code of the block are 1. At present, the first 13 bits need to be 1 (generally, the specific method is uncertain), which means that if the block is generated by enumeration method, the average number of enumerations is 16 ^ 13. Using CPU resources to generate a block is called "gold mining", because the proction of the block will get a certain reward, and the reward information has been included in the block. When a network node generates a new block, it will broadcast to other network nodes. However, this network block may not be accepted by the network, because it is possible that other network nodes have proced the block earlier. Only the earliest block or the block with the largest number of subsequent blocks is valid, and the remaining blocks are no longer used as the initial blocks of the next block. How does the other party confirm that the payment is successful? When the payment information is distributed to the network node, the network node begins to calculate whether the transaction is valid (that is, whether the account balance is enough to pay), and attempts to generate blocks containing the transaction information. When six blocks (one direct block and five subsequent blocks) contain the transaction information, the transaction information is considered "verified", so that the transaction is formally confirmed, and the other party can confirm the successful payment. A possible problem is that I will pay the balance of address a to address B, and at the same time pay to address C. If I only verify that the single comparison transaction is valid. At this point, my way of cheating is to generate six blocks including B to B and six blocks including C to C before the truth is revealed. Because I need a very long CPU time to generate a block, compared with the whole network, the probability of my cheating success is very small. What is the motivation of network nodes to proce blocks? As can be seen from the above description, in order to make the transaction information effective, the network node needs to generate 1 and 5 subsequent blocks to contain the transaction information, and such block generation is very CPU intensive. How to let other network nodes help to proce blocks as soon as possible? The answer is very simple. The agreement stipulates that BTC will be rewarded for the address where the block is proced, as well as the Commission promised by both parties. At present, the reward for procing a block is 50btc, which will be halved every four years in the future. For example, the reward will be 25btc from 2013 to 2016. Is the transaction anonymous? Yes, and No. All bitcoin transactions are visible. We can check all transaction records of each account, such as mine. But what's different from the banking monetary system is that everyone's account itself is anonymous, and everyone can open many accounts. In general, anonymity is not as good as it claims. But bitcoin has another advantage in doing black market trading: it can't be frozen. Even if the police trace a bitcoin address, there is nothing they can do unless they trace the computer used by the exchange based on the Internet address. How to ensure that bitcoin does not depreciate? Generally speaking, in the case of equivalent trading activities, the value of money is inversely proportional to the amount of money issued. Unlike the traditional money market, the central bank can determine the amount of money issued. Bitcoin does not have a central issuing institution. Only by procing blocks can we get a certain amount of BTC currency. Therefore, bitcoin's new amount of money depends on: 1. The speed of procing blocks: bitcoin's agreement stipulates that the difficulty of procing blocks is fixed at an average of 2016 every two weeks, about 10 minutes. Moore's law of doubling CPU speed every 18 months will not speed up the proction of block. 2. The number of rewards for block proction: at present, 50 BTC is awarded for each block proced, which is halved every four years. In 2013, 25 BTC is awarded, and in 2017, 12.5 BTC is awarded. Considering the above two factors, bitcoin's currency issuing speed is not controlled by any single node in the network. Its protocol makes the currency stock known in advance, and the maximum stock is only 21 million BTC
Blockchain is a term in the field of information technology. In essence, it is a shared database. The data or information stored in it is characterized by "unforgeability", "trace in the whole process", "traceability", "openness and transparency" and "collective maintenance". Based on these characteristics, blockchain technology has laid a solid "trust" foundation, created a reliable "cooperation" mechanism, and has broad application prospects
on January 10, 2019, the state Internet Information Office issued the regulations on the management of blockchain information services. In October 24, 2019, ring the eighteenth collective learning of the Central Political Bureau, general secretary Xi Jinping stressed that "block chain as an important breakthrough in core technology and independent innovation", "accelerating the development of block chain technology and instrial innovation". "Blockchain" has entered the public field of vision and become the focus of social attention
on December 2, 2019, the word was selected into the top ten catchwords of "biting words" in 2019
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Application of blockchain Finance:
since 2016, the major financial giants have also carried out blockchain innovation projects to explore the possibility of applying blockchain Technology in various financial scenarios. In particular, Puyin group took the lead in creating a "blockchain +" standard digital currency
standard digital currency refers to the process of assets identification, evaluation, right confirmation and insurance completed by a third party organization, which is written into the blockchain through careful digital algorithm to form the standard corresponding relationship between assets and digital currency, which is called standard digital currency
in order to realize the great leap forward development of blockchain finance, promote the new development of China's economy, accelerate the circulation of global assets, and realize the dream of rejuvenation that has been struggling for generations, Puyin group will hold the Guiyang strategic development ceremony of Puyin blockchain finance in Guizhou on December 9, 2016
the meeting will discuss the realization of digital circulation of assets by blockchain, the financial transaction mode of blockchain, and the application of blockchain services and social public instry. This conference will mark the beginning of the application of blockchain finance and the change and development of the new financial ecology
founded in 1955, Shandong mining machinery group has five holding subsidiaries, including Beijing sankuangtong Technology Co., Ltd., Xinjiang Changmei Mining Machinery Co., Ltd., Shandong mining machinery Laiwu Coal Machinery Co., Ltd., Weifang Keer building materials Machinery Co., Ltd. and Shandong mining machinery Maike building materials Machinery Co., Ltd., with total assets of 2.845 billion yuan, covering an area of more than 1000 mu and more than 2000 employees, It was listed on Shenzhen Stock Exchange on December 17, 2010 (Stock Code: sz002526)
as one of the top ten coal machinery manufacturing enterprises in China, the enterprise is in the leading position in terms of scale, market share and proct technology level. The main procts of the company are hydraulic support, scraper conveyor, transfer machine, crusher, belt conveyor, shearer, digger, single hydraulic prop, jack, engineering oil cylinder, metal top beam, etc Ring chain and the introction of Germany, Italy's advanced technology to proce complete sets of coal gangue, shale hollow brick brick making equipment, complete sets of coal washing equipment
the enterprise has obtained ISO9001:2008 standard quality management system certification and is recognized as a high-tech enterprise. It is Shandong coal machinery engineering technology research center and a designated manufacturer of support procts, mechanical and electrical procts and accessories for China's coal instry. It also has the right of self import and export. All the leading procts have the coal mine safety mark certificate issued by the State Administration of work safety, It has won the honorary titles of AAA credit enterprise of China Coal Instry Association, excellent enterprise of national coal machinery instry, double top ten enterprise of national coal machinery instry, 500 growing small and medium-sized enterprises in China and growing small and medium-sized enterprises in Shandong Province. It has been selected into the top 100 and top 50 of China's coal instry for three consecutive years, and has been listed in the list of China's potential enterprises published by Forbes for five consecutive years. The procts have been recognized as the national coal mine mechanical and electrical procts, among which the Le coal brand scraper conveyor and single hydraulic prop procts have won the title of Shandong famous brand, and the Le coal brand trademark has been recognized as a famous trademark in Shandong Province
the rapid development of Shandong mining machinery group is e to a high-quality and strong technical staff team and a leadership team that dares to innovate and concentrate. The main management personnel of the company continue to work in the company and most of them are shareholders, which ensures the long-term stable development and sustainable competitiveness of the company. Mr. Zhao Duxue, chairman of the board of directors, was once a deputy to the Seventh National People's Congress and the 15th Weifang people's Congress. He also served as vice chairman of the Fifth Council of China Coal Machinery Instry Association, vice chairman of support branch of China Coal Logistics Association, and vice chairman of Shandong Private Entrepreneurs Association. And won the honorary titles of China's coal instry, excellent entrepreneurs of China's coal machinery instry, double top ten entrepreneurs of China's coal machinery instry, Shandong provincial and municipal labor models, influential figures in Shandong Province, excellent managers of Shandong Province, etc
the company focuses on users, takes user satisfaction as the ultimate goal, provides zero distance whole process service, takes responsibility to forever as the purpose, and achieves in-depth pre-sales communication, optimized design and perfection; Strict requirements, quality guarantee period and commitment are required ring the sale; After sales always pay attention, respond quickly and ensure operation. There are 26 service outlets nationwide, forming a perfect service system
Shandong mining machinery group adheres to the business philosophy of honesty, customer first, innovation and improvement, quality first, and is willing to cooperate with friends at home and abroad for common development<
legal representative: Zhao Huatao
date of establishment: December 3, 1999
registered capital: RMB 1782793836
region: Shandong Province
unified social credit Code: 91370700165760323c
business status: in business enterprise
instry: manufacturing instry
Company type: joint stock limited company (listed)
English Name: Shandong mining Ma China Group Co., Ltd.
staff size: 1000-4999 people
business address: North Section of Dayi Road, Changle Economic Development Zone
scope of business: proction, sales and maintenance of coal mining machinery, general machinery, ring chain, hardware rigging, light and small lifting and transportation equipment, building materials machinery, new building materials, steel mold of cement procts (the term of validity is subject to the license). Equipment installation and coal sales; Import and export of related goods and technologies; Mining technology services; Equipment leasing and related technical services; Laser processing equipment, instrial robot equipment proction and sales; Surface composite material preparation and laser processing services; Aluminum bars, instrial profiles, building profiles sales Projects that need to be approved according to law can be operated only after being approved by relevant departments.)
Fourth, decentralization. Decentralization is the most basic feature of the blockchain, which means that the blockchain no longer depends on the central processing node and realizes the distributed recording, storage and updating of data. In the traditional centralized network, attacking a central node can destroy the whole system, while in a decentralized blockchain network, attacking a single node cannot control or destroy the whole network. More than 5% of the nodes in the master network are just the beginning of gaining control. 2019 is the first year for the commercial application of blockchain technology, and the stimulation of favorable policies will make the development of blockchain technology more stable
with the application of blockchain technology graally penetrating into many fields such as digital finance and Internet, we have a clearer understanding of the value of blockchain
blockchain has formed a situation of global competition, and all countries are seizing the development opportunities, let alone China; Therefore, there is no doubt that blockchain has become a national strategy.