Virtual currency with great appreciation potential

1. Mainstream digital currencies can be held and have room for appreciation
such as BTC, ETH, EOS, BCH, ustd, etc

2. Does not exist, now want to buy digital currency to make money? I just want to ask you a question. If you don't choose the mainstream, the rest of the junk's circulation plate is just a little money. If you hold a little more money, are you sure you can sell it out? To put it bluntly, currency is a market value. What can pull a wave at the beginning of the market is speculation. That is, you can buy the currency price with very little money, and then you are fooled into buying it. When you want to sell, after the speculation, no one will buy it. Who will pick up your offer?

3. Words + semantics + Grammar 60 points, basic condition at least 19 points
reading and solving 60 points, basic condition at least 19 points
listening 60 points, basic condition at least 19 points

specific to each question
words + semantics + Grammar:
1-15 questions: score = number of right questions x 10 / 15
16-27 questions: score = number of right questions x 15 / 12
28-54 questions: score = number of right questions X 35 / 27
reading part:
55-75 question: score = number of right answers x 60 / 21
listening part:
question 1: score = number of right answers x 9 / 5
question 2: score = number of right answers x 12 / 6
question 3: score = number of right answers x 12 / 5
question 4: score = number of right answers x 17 / 12
question 5: one time, Two times, three times for each question (question 1, question 2) two points for each question

if the total score is over 90, you can pass it. However, you must score at least 19 points for each single item. I suggest that you practice listening and reading more. You can listen before you enter the examination room and keep your feeling. You should also pay attention to the timing of reading

4.

Beijing Zhongtai Tianyue Technology Co., Ltd. is a limited liability company (solely owned by natural person) registered in Haidian District, Beijing on October 24, 2018. Its registered address is located at No. 059, 7 / F, block B, building 1, No. 38, Zhongguancun Street, Haidian District, Beijing

the unified social credit code / registration number of Beijing Zhongtai Tianyue Technology Co., Ltd. is 91110108ma01f7ka8j, and the legal person is Zhang Ruibao

the business scope of Beijing Zhongtai Tianyue Technology Co., Ltd. is: technology development, technology transfer, technology consulting, technology service and technology promotion; Computer system services; Data processing (except bank card center and cloud computing data center with pue value above 1.4 in data processing); Basic software services; Application software services; Software development; Software consulting; Development of natural science research and experiment; Engineering and technical research and test development; Agricultural scientific research and experimental development; Medical research and experimental development; Organize cultural and artistic exchange activities (excluding commercial performances); Literary creation; To undertake exhibition activities; Design, proce, act as an agent and publish advertisements; business management; Enterprise management consulting; Economic and trade consultation; Cultural consultation; Ecational consultation (except intermediary services); Sports consultation; Health management and health consultation (except for the approved diagnosis and treatment activities); Film and Television planning; Proct design; Model design; Packaging and decoration design; Enterprise planning and design; Arts and crafts design; Computer animation design; Conference services; Translation services; Market Research; Public relations service; Sales of self-developed procts Enterprises independently choose business projects and carry out business activities according to law; For projects that need to be approved according to law, business activities shall be carried out according to the approved contents after being approved by relevant departments; It is not allowed to engage in business activities of projects prohibited or restricted by the instrial policies of this Municipality

check more information of Beijing Zhongtai Tianyue Technology Co., Ltd

5. First of all, we need to be clear that these investment procts are virtual currencies. This requires investors to have more first-hand information and accurate financial sense. In this way, many virtual currencies can be made!

6.

bitcoin, as a well-known virtual currency, has a lot of value-added space. However, if you want to invest now, I advise you to be cautious, because from the perspective of the price of bitcoin, the current price fluctuation of bitcoin is too big, which is likely to cost us nothing, and if the money is locked up, We will not only have a huge financial crisis, but the most important thing is that we don't know when we can take out the money we have locked up. The risk of investing in bitcoin is no less than that of investing in the stock market. if we are professionals, we can determine whether we need to invest by calculating the market trend, but if we are ordinary people, It is suggested that we should not touch the virtual currency as much as possible. From the perspective of investment, the main factors that affect the price of bitcoin are as follows:

3, whether it is more scarce

we know that one of the main reasons why the price of bitcoin rises so rapidly is the scarcity of bitcoin, which is becoming more and more serious now, The proction of bitcoin has stopped, but how it came into being is still a mystery. However, it is certain that there will not be one more bitcoin now. If the scarcity continues to rise, the price of bitcoin will certainly continue to rise

7. 1. Technical support of borderless system
1) efficient and scalable performance
borderless system realizes over 100000 times / s batch transfer
high performance blockchain technology is necessary for cryptocurrency and smart contract platform, and can provide a solution that may replace the existing financial platform for the instry. In order to be able to process more transactions per second than visa and MasterCard, unbounded redesign starts from the bottom. Through the share authorization mechanism, the unbounded network can confirm more than 100000 transfer transactions in an average of one second

overview of borderless system architecture. The Lmax can process up to 6 million transactions per second. The key point of unbounded learning from its technology, As follows:
A) put everything in memory
b) put the core business logic in a single thread
C) put the encryption algorithm operation (hash and signature) outside the core business logic
d) divide the verification operation into state independent and state dependent checking
e) use an object-oriented data model

by following these simple rules, Unbounded can process 100000 transfers per second without disruptive optimization. If there is further optimization work, unbounded can achieve the performance similar to that of Lmax exchange (i.e. 6 million times per second). It should be noted that unbounded performance is highly dependent on one of the compatible transaction protocols. If you want to use business logic to run on a virtual machine that operates encryption algorithm and calls all objects with hash identifier, it is impossible to achieve the same level of performance. Blockchain is inherently single threaded, and the performance of single core CPU is one of the most scarce and difficult to expand. Unbounded technical logic can make the single thread execution highly efficient

endorsement of core business of borderless system
blockchain is a global account book that determines to modify a shared global state transaction. The orders contained in these transactions can change the validity of other transactions. For example, you cannot withdraw money from your bank account before the deposit of your check takes effect. You can't know if a transaction is valid until all previous transactions that can affect a particular account are processed. If two unrelated accounts do not share any common dependency, theoretically, the transactions between the two accounts can be processed at the same time. In fact, it's tricky to identify which transactions are truly independent on a smart contract driven ledger with arbitration conditions. The only way to ensure that the two transactions are truly independent is by maintaining a completely separate ledger and then transferring value between them on a regular basis. If we want to use this kind of performance tradeoff to compare, it can be like the relationship between non-uniform memory access (NUMA) and uniform memory access (UMA). In fact, the consistent memory access architecture is easier for developers to design, and the cost is lower. Inconsistent memory access architecture is usually used as a last resort when building supercomputers and large computer clusters. The computer instry has graally realized that it is not as easy to achieve performance expansion through parallel computing as it was in the early days. After all, the most important thing to do at that time was to increase the frequency of the processor. It is for this reason that processor designers are trying to improve the performance of single thread before trying to use multi thread settings. When multithreading is not enough, and only in this way, cluster computing will be considered

many people in the cryptocurrency instry try to solve the problem of scalability by cluster computing before exploring what can be achieved by a single core of a computer technically
2) Lmax disruptor decomposer technology
Lmax decomposer provides a learning example of what can be achieved on a single thread. Lmax is a trading platform for end customers with the goal of becoming the fastest exchange in the world. They have been very generous in publishing what they have learned<

overview of Lmax architecture:
business logic processor is where all sequential transactions and order matching occur. It is a single thread that can process millions of orders per second. This architecture can be easily used in the field of cryptocurrency and blockchain design. The role of the input resolver is to collect orders from many users from different sources and assign them to a certain order. When the order is assigned to them, they are copied, recorded and broadcast to many rendant business logic processors. The input resolver is highly parallel and can be easily sub contracted into a computer cluster system. When the business logic processor has finished processing the input, an output resolver is responsible for informing those who care about the result. This is also a highly parallel task. Finally, by using a single threaded sample processor and Java virtual machine in the business logic processor, Lmax can execute 6 million transactions per second. If Lmax can achieve this goal, then cryptocurrency and smart contract platform do not need to consider the cluster network solution under the condition of less than 10 transactions per second. High performance blockchain

to build a high-performance blockchain, we need to use the same technology as Lmax. Here are a few things that must be done: put everything in memory, avoid synchronization primitives (locking, atomic operations), and avoid unnecessary calculations on business logic processors. Because memory is designed to be highly parallel, it's getting cheaper. The amount of data needed to track everyone's account balance and permissions on the Internet can be stored in less than 1TB of ram, which can be purchased for less than $15000, and can be installed on the commercialized (high-end) server motherboard. Before the system was adopted by 3 billion people, this kind of hardware would be seen in ordinary desktop computers. The real bottleneck is not the demand of memory capacity, but the demand of bandwidth. In the case of 1 million transactions per second and 256 bytes per transaction, the network will need 256MB of data per second, that is, 1GBIT / s bandwidth. Such bandwidth is not common on ordinary desktop computers. However, such bandwidth is only a little bit of the 100Gbit / s bandwidth of the second generation Internet. The second-generation Internet is available to more than 210 U.S. ecational institutions, 70 companies and 45 non-profit and government agencies

in other words, blockchain technology can easily keep everything in memory, and if properly designed, it can be extended to support millions of transfers per second
3) allocate ID and avoid hash calculation
in a single threaded system, processor cycle is a scarce resource that needs to be reserved. Traditional blockchain design uses hash calculation based on encryption algorithm to generate a unique global ID system, so as to ensure that there will be no collision statistically. The problem with these hashes is that they consume more and more memory and processor cycles. Compared with a direct array index, this method will significantly take up more processor time to find the records of an account. For example, 64 bit integers are easier to compare and operate than 160 bit IDs. A larger hash ID mechanism means less space in the CPU cache and more memory is needed. In the modern operating system, the ram which is not often accessed will be compressed, but the hash identifier is a random number, which cannot be compressed. The model blockchain gives us a way to assign unique IDs around the world. These IDS will not conflict with each other. Therefore, it completely avoids using the identifier based on hash algorithm like bitcoin address to refer to an account, balance or license
4) remove signature verification from the business logic processor
all transactions in the cryptocurrency network depend on the use of encryption algorithm signature to verify permissions. In most cases, the requested permissions can be changed by the results of other transactions. This means that in the business logic processor, permissions need to be defined as a case that has nothing to do with the calculation of encryption algorithm

to achieve this goal, all public keys need to be assigned a unique and irreplaceable ID. After the ID is assigned, the input resolver can verify whether the provided signature matches the specified ID. When the transaction arrives at the business logic processor, you just need to check the ID

the same technology can remove prerequisite checking on objects with irreplaceable static IDs
5) designing transactions for static verification
for transactions, there are many features that can be statically checked without referring to the current global state. These checks include parameter range checking, input de rendancy and array sorting. In general, there are a lot of checks that can be done if the transaction contains data that it "assumes" is global. After these checks are executed, the business logic processor has to make sure that these assumptions are correct. The process is to check the modification timestamp of an object reference related to the transaction signature time
6) smart contract
many blockchains are integrating a common scripting language to define all operations. These designs ultimately define the business logic processor as a virtual machine, and all transactions are defined as scripts run by the virtual machine. This solution has a single threaded performance limit on a real processor, and the problem is exacerbated by forcing everything to be executed through a virtual processor. A virtual processor will always be slower than a real processor even if it uses JIT, but the computing speed is not the only problem of this "everything is a script" scheme. When the transaction is defined at such a low level, it means that the static check and encryption algorithm operation will still be included in the business logic processing, which will also rece the overall throughput. A script engine should never ask to perform a signature checking request for an encryption algorithm, even if the request is implemented through a native mechanism

according to the course we learned from Lmax, we know that a virtual machine designed for blockchain should consider single thread performance. This means that compiler optimization should be implemented at the beginning, and the most commonly used smart contracts should be natively supported by blockchain, while only those rarely used and customized contracts will run on a virtual machine. These custom contracts are designed with performance in mind, which means that the virtual machine should limit the range of memory that can be accessed to a level that can be placed on the processor cache
7) object oriented data schema
in memory

8. If you have an understanding of the project, you can find that the value is seriously undervalued at present, and you will earn money. Penta understands that when he enters, he will be crushed to death and wait for the wind to come.

9. In the medium term, there is a lot of room for RMB appreciation. In the long term, there is still a lot of room for us dollar appreciation. Now the stock market and funds are in recession. You can choose to invest in foreign exchange, but you should pay attention to controlling the risk. Foreign exchange can be traded 24 hours a day. You can buy it one minute and sell it the next. If foreign exchange trading is only converted into cash, the annual limit for each person in China is 5W US dollars; If it is foreign exchange speculation, there is no limit. How to maximize the investment of RMB 10000? Ha ha, foreign exchange speculation or usury