In 2008, the concept of block chain was first put forward by Zhong Ben Cong, and became the core part of e-currency bitcoin in the following years: as a public account book for all transactions.
2008年由中本聪第一次提出了区块链的概念，在随后的几年中，成为了电子货币比特币的核心组成部分：作为所有交易的公共账簿。
So what is a block chain?
那么什么是区块链？
Block chain is a distributed database that is formed by the way of cryptography.
Is it too complicated? It doesn't matter, we have a combination of graphic and text to tell you!
区块链就是通过密码学的方式形成的一个由集体维护的分布式数据库。
太复杂了？没关系，我们图文结合跟你讲明白！
First of all, the birth of a technology must be to solve some problem, so why does the block chain technology be born?
In our daily life, we often use Alipay or online banking transfers, as a user you feel is your money directly to the other account. But the fact is that:
首先一个技术的诞生一定是为了解决某种问题，所以为什么会诞生区块链技术呢？
在我们日常生活中，我们经常使用网银或者支付宝转账，作为用户的你感觉是把你的钱直接打到对方账户。但是，事实其实是这样的：
The Alipay company is "third party", that why we transfer why a "third party"?
Ma Yun gave us a good explanation: how do two strangers trust each other? Third party secured transactions, that is to solve this problem! This is also the beginning of the birth of Taobao and alipay.
But what if Ali's internal system has a problem? If you have a super safe system to do these things! So, block chain technology appears in front of us, it is the super security system! A machine of trust.
The block chain technology emphasizes: to centralization.
这里的支付宝等公司就是“第三方”，那为什么我们俩转账为什么要有一个“第三方”出现？
马云给了我们很好的解释：两个陌生人之间，如何相隔万里却又互相信任？第三方担保交易，就是为了解决这个问题！这也是淘宝和支付宝诞生的开端。
但是，如果阿里内部系统出了问题怎么办？如果有一个超级安全的系统来做这些事就好了！于是，区块链技术出现在我们面前，它就是那个超级安全的系统！一个信任的机器。
区块链技术强调的就是：去中心化。
The traditional centralization method:
传统中心化方式：
"De centralization" in block chain network
区块链网络下的”去中心化的方式
In the center of the network, each user can direct contact, there is no longer any third party involved, inter user transfers like hand in hand to pay in cash, which is why bitcoin will be referred to as "electronic cash".
Well, now A has transferred the money to B, so who will remember the bill? Before Alipay help me account reconciliation, Alipay will exist in the background system unified. The technology of block chain means that a centralized organization helps you to check accounts, and now each participant in the network keeps accounts for you. Everyone has the same account book.
So why is the block chain very safe?
In the block chain, everyone has the same account. Even if you tamper with your own account book, your account will be increased by 100 million, but your account in 51% or more accounts is still 1 cents. That means your balance is 1 cents, and it can't be denied.
Of course, if you can control 51% of the people in the network to help you turn a penny into 100 million, you can get one hundred million, but basically you will have to use the whole nation's strength. If you have this, the village head of the earth village welcomes you to be...
That's why we say block chain network is secure, because the cost of attack is too huge. For example, bitcoin now has a market value of 8 billion dollars. If you want to break it up and get the 8 billion dollars, you may spend about 20000000000 dollars.
在去中心化的网络下，每个用户之间都可以是直接联系的，不再有任何第三方的参与，用户间的转账就像手递手付现金一样，这也是为什么比特币会被称为”电子现金“。
好了，现在A已经把钱转给B了，那么谁来记这笔账呢？之前有支付宝帮我记账对账，会统一存在支付宝后台系统中。而区块链技术就意味着，以前由一个中心化的机构帮你记账对账，现在由每一个网络中的参与者帮你记账，大家都有同一个账本。
那么为什么说区块链非常安全？
在区块链中每个人拥有同一个账本，即使你篡改了你自己的账本，让你的账上多了1亿，可是51%以上的账本中你的账户还是1分钱，那就说明你的帐上余额就是1分钱，无法抵赖。
当然，如果你能控制网络51%的人在账本中帮你把一分钱变成1亿，你就能获得一亿，但基本上就要动用举国之力了！如果你有这本事，地球村村长欢迎你来当……
这就是为什么大家说区块链网络是安全的，因为攻击成本太过巨大，打个比方：比特币现在市值80亿美元，如果你想攻破它并得到这80亿美元，你可能要花费200多亿美元......
Several characteristics of block chain are summarized.
to centralization: there is no third party intermediary, and everything is done by the program.
safety: attack is mainly reflected in the distributed and 51%, even if a node is attacked or downtime will not affect the operation of the network.
the most important thing is: to trust. All social behavior should be built on the basis of "trust", which is the most fundamental problem to be solved by the block chain.
总结区块链的几个特性：
1.去中心化：没有第三方中介，一切都由程序来完成。
2.安全性：主要体现在分布式、51%攻击，即使一个节点被攻击或宕机也不会影响网络的运行。
3.最核心的就是：去信任。一切社会行为都要建立在”信任“的基础上，这也是区块链解决的最根本的问题。
Block chain technology involves many sophisticated algorithms, as well as block authentication, and the above simply introduces the concept. Interested readers can search for relevant technical articles.
From the bitcoin in 2008, block chain has gone through three applications: programmable currency, programmable finance and programmable society. Its application scope has gradually extended to every aspect of social life.
From the perspective of demand side, finance, healthcare, notarization, communication, supply chain, domain name, voting and other fields all begin to realize the importance of block chain and start to connect technology with the real society.
From the perspective of investment side, the supply of investment chain of block chain is rising gradually, and the investment enthusiasm of the limelight is also increasing. The investment density is also bigger and bigger. The funding of the supply side is expected to boost the further development of technology.
From the market application, the block chain will promote the shift of the focus of the company's existing business model, which is expected to accelerate the development of the company. ,
From the technical point of view, the blockchain is expected to promote the transformation of data recording, data transmission and data storage management; the blockchain itself is more like an open Internet protocol layer, basic agreement in the near future will touch even completely replace the existing internet.
From the perspective of social structure, block chain technology is expected to integrate law and economy, and completely subvert the regulatory mode of the original society. The organizational form will change because of it, and the block chain will eventually lead people to a decentralized autonomous society.
区块链技术涉及到很多精密的算法，以及区块认证方式，以上只是简单的介绍了概念。感兴趣的读者可以搜索相关的技术文章。
从2008年的比特币开始，区块链经历了可编程货币、可编程金融与可编程社会三大应用时代，其应用范围逐步扩展到社会生活的方方面面。
从需求端来看，金融、医疗、公证、通信、供应链、域名、投票等领域都开始意识到区块链的重要性并开始尝试将技术与现实社会对接。
从投资端来看，区块链的投资资金供给逐步上升，风头的投资热情也不断高涨，投资密度也越来越大，供给端的资金有望助推技术的进一步发展。
从市场应用来看，区块链将促使公司现有业务模式重心的转移，有望加速公司的发展。、
从底层技术来看，区块链有望促进数据记录，数据传播及数据存储管理方式的转型；区块链本身更像一种互联网底层的开源式协议，在不远的将来会触动甚至彻底取代现有互联网的底层基础协议。
从社会结构看，区块链技术有望将法律与经济融为一体，彻底颠覆原有社会的监管模式；组织形态会因为其而发生改变，区块链也许最终会带领人们走向分布式自治的社会。
不管其发展结果如何，我们都是这个时代的见证者。不是吗？