《史记·七十列传·韩长孺列传》
聂翁壹就回来了，斩了死囚的头，把他的脑袋悬挂在马邑城上，假充是马邑城官吏的头，以取信于单于派来的使者。
聂翁壹乃还，诈斩死罪囚，县其头马邑城，示单于使者为信。
Nie Wuyi went back, cut off a prisoner's head and hung it on Mayi city, pretending it was the head of a Mayi official, to gain trust from the emissary sent by the Chanyu.
<s>[INST] Explain the meaning of this Classical Chinese passage in English: 聂翁壹乃还，诈斩死罪囚，县其头马邑城，示单于使者为信。 [/INST] Nie Wuyi went back, cut off a prisoner's head and hung it on Mayi city, pretending it was the head of a Mayi official, to gain trust from the emissary sent by the Chanyu.</s>
Explain the meaning of this Classical Chinese passage in English: 聂翁壹乃还，诈斩死罪囚，县其头马邑城，示单于使者为信。
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Nie Wuyi went back, cut off a prisoner's head and hung it on Mayi city, pretending it was the head of a Mayi official, to gain trust from the emissary sent by the Chanyu.
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