本目录下的文件夹是以设备序列号(SN)命名的。
对应文件夹内含有相应授权文件，授权文件以对应物料编号（例如：3500.1）命名。其对应的意义请参考如下信息：
The folders in this directory are named after the device serial number(SN).
The folders contain corresponding authorization file, which is named after material number,  for example, 3500.1.
Please refer to the following information for the meaning of material number 

3500.1:通用一机一密证书，用于上大华云
