Deadline of blockchain activity

1. blockchain has developed in five stages
1. Germination stage: the real germination stage of blockchain was from 2007 to 2009. In 2008, a Japanese American with the pseudonym of Nakamoto first expounded a new fantasy report on electronic money in the form of a synonym on the cryptography discussion group, and bitcoin came out. As early as 2007, Nakamoto began to explore a series of new technologies to create a new currency. On October 31, 2008, bitcoin white paper was released, and on January 3, 2009, bitcoin system officially began to operate
the main technologies supporting bitcoin system include hash function, distributed ledger, blockchain and asymmetric encryption; It can be seen that these technologies build the initial version of the blockchain, and it can also be said that the blockchain is the underlying technology of bitcoin. During the three years from 2007 to 2009, bitcoin was an experimental stage in which a very small number of people participated, and the real commercial activities had not really started
2. "Geek" niche stage: here, "geek" refers to people who are crazy about Internet technology and take technological innovation as fashion and life. On February 6, 2010, the first exchange of bitcoin appeared. On May 22 of the same year, someone bought two hamburgers with 10000 bitcoins. On July 17 of the same year, the exchange Mt. GOx was established, marking the official inflow of bitcoin into the market. Nevertheless, the only people who can really understand and enter the market to participate in bitcoin trading are geeks who are keen on Internet technology. They discuss bitcoin technology on the forum, mine for bitcoin on their own computers, and then buy and sell bitcoin on Mt. GOx. Now these geeks have become billionaires
3. Market brewing stage: the price of bitcoin was $13 at the beginning of 2013, but on March 18 of the same year, the government of Cyprus closed the bank and stock market e to the financial crisis, which made the price of bitcoin soar, and the highest price rose to $266 in April. On August 20 of the same year, the German government confirmed the currency status of bitcoin. On October 14, China network announced the opening of bitcoin payment channel. In November, the US Senate hearing also confirmed the legitimacy of bitcoin. On November 19, the price of bitcoin rose to US $1242, forming a new high. Nevertheless, the foundation for blockchain to enter the mainstream social economy is not yet available, and the soaring price of bitcoin is only e to over optimistic expectations. The containment of China's banking system, the collapse of Mt. GOx and other events made the price of bitcoin continue to fall. At the beginning of 2015, the price of bitcoin has dropped below $200. From 2013 to the beginning of 2015, the public began to understand bitcoin and blockchain
4. The mainstream period of blockchain: on June 23, 2016, the United Kingdom left the European Union, the fifth nuclear test of North Korea in September, Trump's election in November and other events, the uncertainty of the world's mainstream economy led to the recovery of bitcoin with the function of risk aversion. The market demand was large, and the increase of trading volume made the price of bitcoin soar from $400 in 2016 to $20000 in 2017, The wealth effect of bitcoin and the transaction overflow caused by network congestion of bitcoin have led to the outbreak of other series of virtual currencies, as well as a variety of blockchain applications, resulting in the emergence of a large number of blockchain assets that are 100 times, even 1000 times and 10000 times, which has aroused the crazy pursuit of the world, Subsequently, the Chicago Mercantile Exchange launched bitcoin futures trading, marking that bitcoin has officially entered the mainstream investment proct series, and bitcoin and blockchain have entered the global attention
5. Instry landing stage: after the market frenzy in 2017, the virtual currency and blockchain have been adjusted in terms of market, supervision, cognition, etc. in 2018, returning to rationality. In 2017, many blockchain projects that follow the blockchain technology will graally die out with the cooling of the market, and the projects with real blockchain applications will be initially implemented. 2018 is not only the first year of the blockchain, but also a gold rush period for the blockchain. After the waves wash away the sand, what remains is relatively good gold
from the perspective of the history of blockchain development, blockchain technology is not yet mature and is currently in the growth period. The specific practical application of blockchain is only used in the financial field. It still needs a long way to go to apply blockchain from other instries. However, we should grasp the trend of blockchain and actively learn from the new field of blockchain.

2. Hello,
WBC is the abbreviation of world blockchain conference, namely the first world blockchain conference
is a semiannual world blockchain instry event initiated and held by the world blockchain consortium,
place: Macao, China,
time: April 22-24, 2018, lasting for 3 days
this is the information I saw on the official website, I hope it can help you.

3. If it refers to the first block g up, on January 3, 2009, Nakamoto Cong g up the first block on a small server in Helsinki, the Netherlands, which is the so-called "Genesis block". For information about blockchain, you can learn more about it in mimacaijing.

4. impossible. If it could, it would not be safe for a long time, and it would not cause so many cases
it's not a file, it's not that simple. Simplicity is not safe for the owner.

5. The most important thing of blockchain is to solve the problem of intermediary credit. In the past, it was difficult for two people who didn't know and trust each other to reach cooperation, and they had to rely on a third party. For example, in the past, there must be a bank or an institution such as Alipay. However, through the blockchain technology, bitcoin is the first time for human beings to complete the transfer behavior that can be trusted by both parties without the participation of any intermediary. This is a major breakthrough in blockchain
Yao Yudong, director of the Financial Research Institute of the people's Bank of China, once bluntly said: "he was born on the Internet and died on the blockchain." In order to warn those traditional financial institutions and Internet giants who are not sensitive to blockchain technology.

6. digital currency will not be stolen in general. If you use a regular wallet and invest in a regular digital currency, there will be no problem!

7. In order to prevent the double spending problem, the system will automatically time stamp the transaction information of each block and mark it with time brand. How much money you spend at this time is spent. It has been recorded and can't be used to buy other things
how to record it? In fact, the time stamp and other transaction information on the block are calculated to obtain an encrypted value, which is called "hash value". Each new block contains the hash value of the previous block, thus forming a blockchain
so we say: bitcoin system is actually a layer by layer nested, never-ending, very powerful timestamp system, which uses timestamps to ensure that each block is linked into a "chain" (that is, block chain) in chronological order
from this point of view, time stamp literally means to time stamp a block. Its practical function is to provide an important parameter for later hash value calculation, which is an essential and very important information in the process of calculation and verification
finally, we summarize the content of this section. This section mainly introces two terms: utxo and timestamp. These two concepts are important means to solve the "double flower problem", which can ensure that bitcoin can not be used many times without a third party organization.

8. At present, Internet breeding software includes all people raising cattle, Lenong's home, Aishang raising pig, chicken housekeeper, ugly ckling farm, etc. all people raising cattle, falling in love with raising pig and chicken housekeeper are income oriented apps with little user interaction. They are investment income oriented apps. Ugly ckling farm is an app developed by Shenzhen ugly ckling Innovation Technology Co., Ltd., focusing on user breeding experience, Real time online breeding and offline breeding can be synchronized. Those who have children at home and need to raise their own cks to supplement their families can raise their own cks and eat by themselves through this platform, which is visible in real time, green and pollution-free, and recommended by the wall.

9. I have seen the report before. It will be put forward by Changsha urban block chain Application Technology Association at the Yuelu Summit on April 3. The deadline for submission and application of works will be May 31. In fact, you can register first and then submit your works within the specified time.

10. On April 3, the "2019 Internet Yuelu summit" blockchain Technology Application Forum was held in Changsha. On the spot, the "Changsha urban block chain public service platform" prepared and built by Changsha urban block chain Technology Application Instry Association (Preparatory) was officially launched. Relying on the support policies of Changsha City and other districts, it will collect application solutions for block chain instry globally, form instrial clusters, promote the development of Changsha block chain instry chain, and form regional core competitiveness in the whole country
1. Benefit from participating in the project
1. Enjoy the blockchain support policies announced by Changsha City and all districts
2
3
4. Participate in the construction of blockchain public service projects announced by Changsha City and various districts< 2. Participation conditions: 1. Facing global enterprises and development teams
2. Independent intellectual property rights, no intellectual property disputes
3. Application scenarios: whether the projects are actually commercial in the fields of government affairs, public services and instry scenarios, and have practical significance
4. Safety: the participating projects are safe and reliable, and can pass the safety test of relevant safety professional institutions
5. Continuous operation ability: the participating enterprises and technical teams have continuous operation ability for participating projects
6. There is no state order to prohibit or ban related behaviors< Third, the overall construction plan of public service platform is divided into three stages, and the participating enterprises and technical teams can choose to join the corresponding cooperative projects according to their own actual situation. Each stage will release the theme of project cooperation direction, and the platform will also update the theme of the project according to the actual situation and needs. Participants independently design related topics according to the selected project theme to register for participation. The overall construction plan is as follows:
the first stage involves topics in the fields of electronic certificate keeping, right works registration and judicial expertise
the second stage: topics related to e-government and financial and tax management (continuous update)
the third stage: topics related to anti-counterfeiting traceability, points management and residents' health management (continuous update).