Micro-service is a software development technology, which advocates dividing a single application into a group of small services, which coordinates and cooperates with each other to provide ultimate value for users.The micro-service （1） has many important benefits.First,it solves the problem of business complexity. It decomposes the original huge single application into a group of services. Although the total amount of functions remains the same, the application has been decomposed into manageable services.The development speed of a single service is much faster, and it is easier to understand and （2）. Second, this architecture allows each service to be （3 ）  independently by a team. Developers are free to choose any appropriate technology. Third, the micro-service architecture mode enables each service to be （4 ） independently. Developers never need to coordinate the deployment of local changes to their services. These types of changes can be deployed immediately after testing. Finally, the micro-service architecture enables each service to （5 ） independently.

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