1. Why doesn't Amazon CloudFront cache files for the length of time I specify?
https://aws.amazon.com/cn/premiumsupport/knowledge-center/cloudfront-cache-files-time/
2. Amazon CloudFront cache policy (expiration time)
3. Set the cache time for aws s3
https://docs.aws.amazon.com/zh_cn/AmazonCloudFront/latest/DeveloperGuide/Expiration.html
Cache-Control: max-age=86400, s-maxage=3600