Meeting content of Ethereum on June 30

1.

a brief history of etheric Classics (etc)

etheric classics began with an unfortunate event

in May 2016, the decentralized autonomous organization (DAO) held a token sale with the goal of establishing a blockchain based venture capital to fund future decentralized applications (dapps) in the Ethereum ecosystem

basically, Dao is a complex smart contract that operates in a decentralized way - computer code that automatically performs tasks between multiple parties when conditions are met

despite its ambitious goals and successful token sales, Dao's code has a major vulnerability that allows attackers to steal eth from decentralized organizations

the attacker took advantage of this vulnerability in June 2016, triggering the infamous Dao hacking event, and maliciously stole eth worth about US $50 million

there is no doubt that Dao hacking has shocked Ethereum community and made eth price drop from $20 to $13

after the Dao hacking, the Ethereum community has to choose from three options

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do nothing and try to bear the consequences of the attack

start soft bifurcation to recover funds

deploy a hard fork to recover the lost eth

both soft and hard bifurcations are significant network upgrades. However, soft fork allows users who are not upgraded to communicate with upgraded users, while hard fork is not backward compatible with previous versions

as developers realize that deploying soft forks will expose the network to distributed denial of service (DDoS) attacks, Ethereum community decides to initiate hard forks to recover the funds lost in Dao hacking attacks

although this scheme is supported by most people, a small number of people in Ethereum community oppose it. They think that "code is the law" and blockchain network should be unchangeable

the failure of both sides to reach an agreement on the solution eventually led to the fragmentation of Ethereum blockchain

those who tried to recover the lost eth chose the hard fork and opened the Ethereum (ETH) blockchain as we know it today, while another group stayed on the original Ethereum classic (etc) chain

what problems does ethereal classic solve

Ethernet classic (etc) is a blockchain platform that allows developers to deploy smart contracts and dapps

although this function is the same as Ethereum (ETH), etc blockchain has two main differences

first of all, Ethereum classic community opposes tampering with distributed ledger and supports the view that "blockchain network cannot and should not be modified"

secondly, although there is no rigid upper limit on the total supply of eth, it is allowed to create 230 million etc at most by adopting the monetary policy of constant supply

as a bonus item, ethereal classic launched Atlantis hard bifurcation last year to increase the interaction with Ethereum and improve the privacy protection of transactions through ZK snarks

the trading platforms recommended by ethereal classic etc are: Fire coin, okex, AAX, etc

2.

The idea of Ethereum was born in 2013. Vitalik buterin ˙ When he was a programmer in the bitcoin community, he suggested to the core developers of bitcoin to develop a language for application developers to facilitate the development of various applications. Bitcoin core developers disagree. So God V decided to develop a new platform for this purpose

V God wrote the white paper of etheric currency in 2013, in which he explained the goal of building a decentralized program. In 2014, we got development funds through crowdfunding, so we developed the Ethernet system< (better digital currency trading platform "currency exchange")

since its birth, it has carried out four hard bifurcations so far

for the first time, in order to adjust the difficulty

released a stable version of "homeland" for the second time

for the fourth time, in order to prevent DDoS and rece weight

there is only the third hard fork, because of the hacker attack, and forced to fork. This is the Dao event

On July 30, 2015, v-god and Ethereum Foundation created the first smart contract platform and designed the Dao Ethereum contract

on April 30, 2016, the Dao smart contract was officially deployed, and the world's largest crowdfunding was completed, reaching an amazing $150 million As an aside, the biggest crowdfunding event in time is EOS crowdfunding, which has reached an even more amazing $5 billion!)

on June 17, 2016, the Dao was attacked by hackers, who stole about 50 million US dollars of Ethernet currency, and the price also plummeted from US $20 to US $15, causing great harm to Ethereum. In order to recover the loss of investors, the community finally decided to hard fork

therefore, on July 20, 2016, at the block height of 1920000, the hard branching was successful, and the new chain is called Ethereum eth, while the original chain is now Ethereum classic etc

3.

According to foreign media reports, although the price of bitcoin has dropped sharply this year, the cryptocurrency conference is still a major event

This week, coindesk, a well-known bitcoin news website, will hold a three-day bitcoin conference in New York City with a ticket price of about $2000. It is expected that 4000 people will attend the meeting, which is a lot more than last year's 2700 people. As a result, ticket revenue for the conference will be at least $8 million

within a few days of the bitcoin conference in New York, there are 20 other conferences held at the same time, and the ticket price of these conferences is also very high. Three years ago, the consensus conference was first held, and only 400 people attended. Now, the conference has become the main feature of blockchain week NYC

before and after the consensus meeting held in May last year, the price of bitcoin soared to about $2000. Of course, this is also the result of the first tokensummit summit and ethereal summit

since then, the price of bitcoin has skyrocketed, successfully attracted the interest of Wall Street, and exceeded $10000 for the first time after the consensis invest meeting held in November. In December, the price of bitcoin peaked at more than $19000. But since then, its price has fallen by more than half

strong speaker lineup

this year's speaker lineup shows that the cryptocurrency instry has taken an important step towards the mainstream direction. Jack Dorsey, co-founder of microblogging site twitter, is e to speak at the consensus conference on Wednesday. Square, his mobile payment company, also launched bitcoin trading this year. Other members of the meeting's expert group include government officials and heads of start-ups

"the consensus conference is very famous. If you give a speech at the conference, it means that you are also very famous." Said Michael oved, co-founder of airswap, the cryptocurrency exchange. He is also the organizer of the fluidity blockchain conference held last Thursday

he said that he deliberately lowered the ticket price of his fluidity conference to $150-250. Because he thinks it's a "good opportunity for us to share what we're studying.". About 700 people attended the fluidity conference, and ticket sales reached about $140000, oweed said

"ironically, the organizers charge a lot, but they never pay the speakers. These speakers are the people who are most concerned about the development of the blockchain community and are most eager to share new developments. " She tweeted on April 28

she will give speeches at ethereal summit and consensus meeting this week“ Neither of these meetings paid me for my speech. " She said. She added, "live online is a great way for the public to watch the content of the conference."

"too many meetings, it's crazy"

all kinds of meetings are very powerful and lively, but we don't know whether they finally help start-ups, especially those with imperfect management

"there are too many meetings now. It's crazy." "In the San Francisco Bay area alone, there's a weekly meeting on blockchain," oweed said. It's easy for us to be distracted by these meetings. "

however, some people are convinced that these meetings will eventually be the catalyst for the recovery of bitcoin prices

"after the previous consensus meetings, the price of bitcoin will rise. This fact strongly supports our view that the price of bitcoin has hit the bottom this year. " "During every meeting, the price of bitcoin goes up 10-70%," Tom Lee, co-founder of fundstrat global research, a market research firm, said in a research briefing on May 7

he added, "considering the significant increase in the number of participants, we believe that the price of all cryptocurrencies will increase similarly."

4.

The extension of the chain of etc was unexpected by the Ethereum community at that time. When 90% of the computing power was switched to the new chain eth, Ethereum classic with 10% of the computing power appeared in the Ethereum community. This 10% of the computing power is still reported in the short chain, until P network suddenly launched a digital asset called etc, and the token of Ethereum classic was officially born. At that time, the online P network of etc once caused the threat of replay attack. It was predicted that if etc could not solve this problem, etc, a short chain abandoned by most Ethereum communities, would not last. However, etc is still running today< a better digital currency trading platform "currency exchange"

compared with eth, led by vitalik, a computer genius and blockchain star, etc's development team is too quiet. In today's blockchain field, Ethereum has become the second largest cryptocurrency after bitcoin in terms of market value. At the same time, community members are all over the world. According to statistics, among the 100 blockchain projects, 94 are based on Ethereum platform. Such brilliant achievements, in addition to Ethereum development team's superb technology, of course, there is no lack of fierce marketing. Compared with other teams, God V's blessing is originally a big IP, although Ethereum has grown into the second largest cryptocurrency. Today's V God will still hold meetings all over the world, marketing itself as well as eth

on the other hand, etc has been lukewarm for many years. With the continuous development of the blockchain instry, etc, as an old currency, is about to be submerged in the long history. Is it true that, as the instry says, etc and dogcoin are guerrillas? Looking back on the development history of etc in recent years, in 2016, Ethereum classic (etc) was born in the Dao event, which was maintained by a new development team. P network is the first online exchange of etc. with the addition of more and more computing power, the trading volume of etc has graally increased

5.

The

Ethereum mining

Berlin hard fork will mark the end of the metropolitan era. This is a key stage in Ethereum's history, which is divided into two stages (Byzantine and Constantinople), including several branches, including Atlantis, Istanbul, and finally reached its peak in Berlin

6.

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1, Ping An of China is now in the stage of transferring to other instries , and is developing towards Internet finance

2, the brand of state-owned enterprises and after-sales service are guaranteed China Life Insurance is a state-owned enterprise. Its head office and many of its subsidiaries constitute the largest commercial insurance group in China. It is also one of the largest institutional investors in China's capital market and one of the world's top 500 brand enterprises. It is known as the "mainstay" of China's Insurance instry

3, rate of return China Life Insurance is on the rise : the total rate of return on investment of China Life Insurance in the first half of the year was 5.77%, up 199 basis points compared with the same period in 2018. After considering the net changes in fair value of available for sale financial assets included in other comprehensive income in the current period, the comprehensive return on investment was 8.24%, up 463 basis points compared with the same period in 2018

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5. Claim cases of China Life Insurance Company:

A. at 22:55 on June 17, 2019, a 6.0 earthquake occurred in Changning County, Yibin, Sichuan Province. After the earthquake, China Life Insurance Company attached great importance to it and immediately launched the emergency plan for major emergencies. At 8:32 a.m. on June 18, customers' vehicles in Gaoxian County of Yibin were damaged e to falling objects

China Life Insurance completed the company's first compensation in this disaster within one hour after receiving the report. As of June 24, Yibin Branch of China Life Insurance received 10 reports from the earthquake area, with no casualties. At present, 9 pieces of compensation have been completed, with compensation of more than 20000 yuan. China life property insurance will continue to provide customers with fast, convenient and humanized services

In June, 2019, there will be heavy rain in many places in southern China, resulting in the outbreak of flood and waterlogging disasters, which will cause serious damage to crops, enterprises, institutions and people's property

after the disaster, China life property insurance attaches great importance to it, and relevant institutions at all levels care about the affected customers, start the emergency proceres at the first time, formulate the emergency measures and plans for claim service, simplify the claim process, and fully carry out the claim service

as of June 24, 1395 cases had been reported e to the rainstorm in southern China, with an estimated loss of more than 20 million yuan. All claims settlement work is being carried out in an efficient and orderly manner, so as to restore the normal proction and life of the affected customers as soon as possible

extended information:

common mistakes in insurance:

first, the more varieties you buy, the more comprehensive the protection you enjoy: Although there are many kinds of insurance, you should still act according to your ability when you buy, not the more complete the better. According to their occupation, age, family structure, physical condition and economic ability to choose the varieties needed at present. The expert's suggestion is: the expenditure of the insured project should not exceed 10% of the income

Second, if children are the future, it's better to insure them: the cost on children is a relatively large part of the total expenditure of each family. Including the usual food and clothing, as well as children's ecation. Some parents set up ecation funds for their children from a very early age, but ignore that they are the backbone of the whole family

once the power to generate income for the family weakens or even disappears, the impact on the family will be great. Therefore, when insuring, we must first consider the insurance for the family's pillars, and then consider buying insurance for other family members when we have the spare capacity

Third, if you buy more, you will lose more: in today's increasingly competitive market economy, the homogenization of procts is becoming more and more serious. The procts of the major insurance companies are very similar. So many people hold such an idea: if I take out the same kind of insurance in many insurance companies, there will be many claims at that time

Note that this is a typical mistake in insurance. The principles of claim settlement are different for different types of insurance. Here's an example: Wang injured her leg in an accident. Before that, she bought medical insurance from three insurance companies. She thought she could get three times the compensation

However, she does not know that medical expense insurance, as a kind of compensation insurance, applies the compensation principle, that is, within the limit of the insured amount, the insurance company pays the insurance benefits according to the actual medical expenses of the insured

in other words, no matter how many insurance companies you have taken out, the final total amount of insurance should not exceed the actual medical expenses. Before insurance, we should first understand the insurance company's claim principle, claim channel and claim amount, so that we can get the expected compensation when we are out of danger

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Network - ping an insurance (Group) Co., Ltd.

Network - China Life Insurance (Group) Co., Ltd.