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Target customers: all regions in mainland China. Features released: Alibaba Cloud Elasticsearch provides elastic nodes. The pay-as-you-go billing method is used for the nodes. You are charged for these nodes based on usage duration. You can configure scaling rules for an Elasticsearch cluster based on traffic fluctuations. The system scales in or out the Elasticsearch cluster at the time specified in the rules. During the scaling, the system adds or removes elastic nodes and index replica shards. This way, your cluster can manage resources during peak hours and off-peak hours to reduce business costs.