PREVIEW
... at inevitably requires different methods in different places.
To pry some information from certain people, even using every trick in the book might not open their mouths; but to learn something from others, spending just twenty minutes chatting might reveal everything they’ve eaten for meals in a day, clear as day.
The former is difficult, the latter is not easy either.
After all, people don’t just casually open up their hearts to others, and acquiring useful intelligence ...
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