It is a "ferry" - the gap where the living and the dead meet. Those "customers" are all dead souls stranded in the world. They come to the convenience store to fulfill their unfulfilled wishes before they can truly leave.
The role of the night shift clerk is not a cashier, but a "ferryman".
But there are more than eight rules. There was an unnumbered sentence written in Lao Zhou's notes: "Rule 9 - Don't let any customer leave before 4:44 in the morning. If someone disappears in front of you, don't chase him." Lu Yuan gradually understood that these rules were not set by the store manager, but the laws of the convenience store itself.
