For question #1, in examples COSBench ships, <auth> and <storage> are configured at <workload> level, but COSBench really supports to configure <auth> or <storage> at other levels like <workstage> or <work> level. It means user could set different users for different workstage or work. in the other side, COSBench supports to configure multiple same stages, e.g., user can configure multiple "init" stage with different users to different containers.
For question #2, COSBench supports to read/write/delete for containers and objects, one new operator in plan is "list".
For question #3, I can speak chinese too

, and COSBench is developped in China. But many users are international, so english is the default language in this mailing list, and I'm using english to answer questions to let others know. sorry if inconvenience.
-Y.G.