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Intended customers: users that need the ability to process transactions and use NoSQL, such as users in the finance industry. Version/Specification: ApsaraDB for MongoDB 4.0 has integrated the speed, flexibility, and function of document models with Atomicity, Consistency, Isolation, Durability (ACID). Using ApsaraDB for MongoDB to resolve user cases becomes much easier. With transaction characteristics, standby nodes no longer block request reading during log synchronization. ApsaraDB for MongoDB 4.0 supports concurrent operations of reading and writing. The performance of new shard migration has been increased by 40%. New nodes are able to handle the workload much faster.