Amazon VPC Flow Logs is now available in the Beijing (China) region. VPC Flow Logs is a feature that enables you to capture information about the IP traffic going to and from your VPC. Once enabled for a particular VPC, VPC subnet or Elastic Network Interface (ENI), relevant network traffic will be logged to CloudWatch Logs for storage and analysis by your own applications or third-party tools. Additionally, metrics can be created to identify trends and patterns.