What Lu Yan delivered was not express delivery, but rules. It becomes effective upon receipt, and alienation upon breach of contract. The rules said that no help was allowed except for the delivery, but after he said half a sentence more, the system added the package—the recipient was himself. The last line of Lao Zhou's note: "The last order is yours." He thought it was a warning, but later he learned that it was his last words.
The core difference: the protagonist is not a survivor trapped in the rules, but the one who gives the rules. He is neither within nor outside the rules, and this sandwiched identity comes with its own moral dilemma - he can see how others die, but he cannot save them. The more he helps, the more dangerous he becomes. In the end, he himself will be the last order.
