It's pointless and improper to tell lies or be insincere when dealing with someone who is genuine, honest, or already fully aware of the facts.
这件事的来龙去脉他一清二楚，你还是别在他面前玩花招了，要知道“真人面前不说假”。
He knows the ins and outs of this matter perfectly; you'd better not play tricks in front of him, remember, "don't tell lies in front of a true person."
Era:
Ancient
Frequency:
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