| Blockchain is an emerging comprehensive technology system.Its decentralized,distributed,and non-tamperable features play an important role in solving specific problems in the social field.In the volunteer management model,the concept of time bank was put forward ten years ago,mainly by recording the volunteer service that volunteers participated in with time,which can be exchanged for when you need help.However,in practical applications,there will be many problems such as difficulty in keeping time records,different evaluation standards for time value,and data tampering.Related scholars have applied to the block chain time banking model,but there are two significant problems.On the one hand,the public welfare time chain proposed by computer background scholars is more of a model describing how to conduct time quantitative transactions,but it lacks the evaluation of the authenticity and effectiveness of the service duration,and the evaluation criteria for the value of time.On the other hand,scholars in the field of social sciences do not have a deep understanding of the blockchain technology itself.At the same time,due to the lack of blockchain technical talents,they mistakenly use the old technologies of the generation of blockchains such as proof of work and computing power.In time to the management of the bank,it naturally produces immature technology,high cost applications,running low efficiency.In response to the above problems,this article uses a single-case research method to go deep into Y Hospital to conduct research and practice on the blockchain time bank model.Through discussions with Time Bank organizers,participants,collaborators,and related social enterprises,the specific countermeasures for blockchain application in Time Bank are improved and strengthened.At the theoretical level,it is supplemented and extended on the basis of the basic recognition that "everyone’s time is equivalent".Using the blockchain distributed accounting method,more detailed volunteer service parameters are recorded.Proposed incentives based on honors and titles,so that volunteers with high technical content and high labor intensity are also recognized.At the same time,the blockchain embeds a transparent,open and traceable accounting method,which lays a good foundation for the sustainable incentive system and the mode and realization of time-currency deposit and exchange.At the technical level,a method of introducing a new type of blockchain technology to separate the state chain,evidence chain,and authentication chain of storage service records is proposed.This method can reduce the initial technology costs and improve its operating efficiency.Among them,the operation mode of service status record,evidence chain,and authentication chain is described through the display form of finite vector and class diagram.At the practical level,the basic model of time-currency deposit and exchange is constructed: the Provider-Social Capital-Provider’s model.The author analyzes various social capital stakeholders of Time Bank,and explores the support and resources that can be provided by the participation of hospitals,enterprises,and grassroots units in the construction of Time Bank Co-construction Mode,as well as the benefits that it can obtain from Time Bank.Embedded in blockchain technology,using smart contracts to clearly write out the support that each participant of social capital needs to provide and the benefits that can be enjoyed.The use of blockchain technology to establish a mutually beneficial co-construction model between Time Bank and social capital can produce a catalyst effect and allow Time Bank to continue its long-term operation.This case study draws the following conclusions: First,the principle of time equivalence is the value premise for the development of Time Bank;second,blockchain technology is an important means to promote the development of Time Bank.Among the innovation contributions,the use of the second-generation blockchain technology to effectively reduce the operating cost of Time Bank,and the exchange incentive mechanism has laid the foundation for time bank national interoperability.When reflecting and looking forward,we found that Time Bank still faces the following challenges: Participants have doubts because of insufficient understanding of blockchain technology. |