应该将其报告为错误而不是功能请求，不是吗？

这个应该不算是程序错误吧，我觉得应该算是设计缺陷，😀

找到aria2.conf 然后输入一行force-save=true。也就是在任务完成后保留下载进行时候的那个.aria2文件 。

然后设置里面也设置成做种直到手动停止。

.aria2文件跟下载完成的资源要放在同一个文件夹里面。种子文件可以随意。

然后把种子文件拖到motrix就可以继续做种了，注意建立任务的时候保存路径要选到 .aria跟资源在一起的那个文件夹

Simply add "check-integrity=true" in aria2.conf

Normally if you lose a control file, you cannot resume download. But if you have a torrent or metalink with chunk checksums for the file, you can resume the download without a control file by giving -V option to aria2c in command-line.

Simply add "check-integrity=true" in aria2.conf

Normally if you lose a control file, you cannot resume download. But if you have a torrent or metalink with chunk checksums for the file, you can resume the download without a control file by giving -V option to aria2c in command-line.

this works, but still need to add the same task and make the save path as the local folder that already downloaded, not convenient enough.

找到aria2.conf 然后输入一行force-save=true。也就是在任务完成后保留下载进行时候的那个.aria2文件 。

然后设置里面也设置成做种直到手动停止。

.aria2文件跟下载完成的资源要放在同一个文件夹里面。种子文件可以随意。

然后把种子文件拖到motrix就可以继续做种了，注意建立任务的时候保存路径要选到 .aria跟资源在一起的那个文件夹

Simply add "check-integrity=true" in aria2.conf

Normally if you lose a control file, you cannot resume download. But if you have a torrent or metalink with chunk checksums for the file, you can resume the download without a control file by giving -V option to aria2c in command-line.

感谢二位！我综合了你们的办法，在aria2.conf结尾添加了force-save=true和check-integrity=true，就可以一直做种所有下载完毕的文件了！
查找aria2.conf的方法：打开任务管理器，找到aria2c.exe，在右键菜单中选择“打开文件所在位置”：

然后就能看到aria2.conf了：

English version:
thank you both! i merged your solutions, which is, appending "force-save=true" and "check-integrity=true" to the end of aria2.conf. then i can keep seeding all the file that newly downloaded.
the way you locate aria2.conf:open your task manager, find process "aria2c.exe". then right click on it, chose "open the location where the file locates":

then you can see aria2.conf: