To ensure one always gains something; to never come away empty-handed; to always make a profit or acquire something.
他每次参加展会，总能带回一些有用的资料或联系方式，真是贼不空手
Every time he attends an exhibition, he always manages to bring back some useful information or contact details; he truly never comes away empty-handed.
Era:
Ancient
Frequency:
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