It's The 10 Heavenly Stems That Represent The Days Of The Week.

The specific ancestor families would venerate on that day.

Something you may remember for the "Momento Mori" section of the 2022 Winter Olympic Closing Ceremony. Even if you still haven't found the dimension where I've already written it.

It was one of those mistakes I realised the moment I logged out.

I'll tidy it up on in the next edit.