Basic knowledge points about blockchain:
----------【The following must be understood and memorized】-----------
Blockchain: A blockchain is a distributed data storage system, a distributed ledger that records how many coins each person has. It will not lose data due to a server failure or power outage in a certain area.
Block: In the Bitcoin network, data is permanently recorded in the form of files, which we call blocks. A block is a set of records of some or all of the latest Bitcoin transactions that have not been recorded by any previous blocks.
Public chain: A completely open blockchain, meaning that anyone can read it, anyone can send transactions that can be validly confirmed, people from all over the world can participate in system maintenance work, and anyone can read and write data through transactions or mining.
Private chain: A blockchain where write permissions are limited to a certain organization or a specific few individuals. Read permissions can be open to the outside or restricted to any degree.
Consortium chain: A blockchain whose consensus mechanism is jointly controlled by several designated institutions.
Main chain: The term main chain comes from the mainnet (as opposed to testnet), which refers to an officially launched, independent blockchain network.
Side chain: Pegged sidechain technology allows the transfer of Bitcoin and other digital assets between multiple blockchains, meaning that users can access new cryptocurrency systems while using their existing assets.
What is a "token"? (Tokens are also known as smart contracts and can also be called token certificates)
Token is usually translated as certificate. Token is one of the important concepts in blockchain, and its more widely known name is "token", but in the eyes of professionals in the blockchain community, it is more accurately translated as "certificate", representing a proof of rights on the blockchain rather than currency.
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