From the earliest simple ledgers to double-entry ledgers, to digital ledgers, and the distributed ledgers that are currently being explored, every breakthrough in ledger technology will trigger important innovations in the financial field, and often further have a profound impact on all aspects of social life. . This answer clarifies the ins and outs of blockchain and related concepts, and discusses the evolution law from blockchain to distributed ledger technology. It is crucial for the financial field to correctly view and apply this scientific and technological achievement. ...