打红框的地方按照自己实际存储桶的位置来填写。比如北京是cn-north-1，宁夏是cn-northwest-1 节点的S3 Endpoint填写s3.cn-north-1.amazonaws.com.cn，也是把里面的cn-north-1按照实际情况替换 桶地址使用%(bucket)s.s3.cn-north-1.amazonaws.com.cn，同样，替换掉cn-north-1