What kind of virtual currency is q-coin
the central bank's supervision of virtual currency is mainly reflected in the supervision of bitcoin. The central bank forbids any enterprise or indivial to use bitcoin as a payment tool. As a payment tool, virtual currency has great risks, Therefore, the central bank's supervision of virtual currency is very strict
The first number, as long as you can relay on, you can fill in any one Pay special attention to the number of chickens at the beginning of the second line, which can't be less than 25!)
the problem of double spending is that a sum of money can be spent twice, three times and many times. Why has the double flower problem become such an important issue in the bitcoin system
the reason is that bitcoin is a virtual currency. It is virtual, presented in the form of code, and can be copied. Once the code vulnerability is broken, the same bitcoin can be recycled. In this way, the "money" of bitcoin will become very weak
let's think about it. If a sum of money can be spent many times, and you have 500 yuan, you can buy a 500 yuan dress, which can be recycled, and then buy a pair of 500 yuan shoes. In this way, can money be called money
therefore, when Nakamoto set up the bitcoin system, all his technical means are basically around solving the "double flower problem" of
, to protect bitcoin as a kind of currency, its own function as a means of payment
in fact, the problem of double spending is not a problem in our present centralized world, because with banks, the settlement of money transactions is through banks, which is very safe. If you have problems, you can go to the bank directly
however, in the decentralized world, without such a central institution as banks, it is necessary to ensure that a sum of money can only be spent once. How to eliminate the "double spending problem" under the premise of decentralization is a difficult problem
let's just say, why is Nakamoto so persistent in pursuing "decentralization" and asking for trouble? No, he hopes to solve some social problems through decentralization, the most important of which is the inflation caused by the excessive issuance of money by the authority
so, let's sum up his logic: centralized currency issuance leads to inflation - so we need to achieve Decentralization - decentralization will face many problems, the biggest problem is the double flower problem - so we need to solve the double flower problem - how to solve the double flower problem
here, Nakamoto introces the concepts of utxo and "timestamp" to solve the double flower problem
the basic use is
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can be converted into game currency in the game
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you can apply for QQ super players and Diamond members
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you can buy clothes, scenes, jewelry and other items in the QQ show
2.
a q-coin is equivalent to 1 yuan in RMB
3.
you can buy a q-coin card at the newspaper point
with different face values and different prices,
you can also win the game in the game (you can win a certain amount of QQ game currency by winning the game
, Then it can be changed into Q currency
the exchange rate is 15000 game currency for 1q currency)
Tencent Q currency is a virtual currency that can be paid uniformly on Tencent website, and the face value of Q currency is 1 yuan, 2 yuan, 5 yuan, 10 yuan and 20 yuan respectively. The q-coin of 1 yuan is a 12 digit string, and the q-coin of 2 yuan, 5 yuan, 10 yuan and 20 yuan is a 14 digit string starting with 2, 5, 1 and 8 respectively. The applied q-coin can purchase a series of related services on Tencent website, and input the corresponding q-coin amount according to the corresponding prompt when purchasing
QB is a virtual currency launched by Tencent, which can be used to pay for QQ bank number, QQ member service and other services. Tencent q-coin, through the purchase of QQ card, telephone recharge, bank card recharge, network recharge, mobile phone recharge card, one card recharge card and other ways to obtain
the face values of QQ cards are 10 yuan, 15 yuan, 30 yuan, 60 yuan, 100 yuan and 200 yuan respectively.