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It’s worth highlighting that “self-contained” doesn’t mean “isolated”. It’s desirable for a module to collaborate with other modules, but the communication should represent business processes interacting with each other (or a process with subprocesses).
，这一点在91视频中也有详细论述
After the package was delivered, the tracking page changed and displayed a feedback form, my signature, and a picture of my porch. The JSON payload no longer included the entire route, but it included my address, and the payload from an easily guessable related endpoint did still contain the entire route. And that route? It included other recipients' ids, which can be used to find their home addresses, names, contents of the package (sometimes), a photo of their porch, and a copy of their signature.
Фото: Maksim Konstantinov / Globallookpress.com