score:2
I believe the term you're looking for is shouyi (守邑), "guardian town".
In truth, I'm not sure what information/reading you're asking for. A particularly obscure topic, if I may say so.
If you're looking to understand the logic of Chinese rituals on ancestor worship, a good book is "Chinese Thought" (2019) by Roel Sterckx (Joseph Needham Professor at Cambridge).
Alternatively, his earlier work could also be useful - "Food, Sacrifice, and Sagehood in Early China" (2011).