jp218-idc 是一个仅供所有者本人使用的内部同步工具：在所有者自己的服务器与所有者自己的 Google 云端硬盘之间传递文件（软件升级包、运行结果、备份）。
jp218-idc is a private, single-owner utility that moves files between the owner's own server and the owner's own Google Drive (software update packages, job results and backups). It has no public users and does not accept sign-ups.