不 (Bù) = not.
没 (Méi) = none.
否 (Fǒu) = deny.
Tā méi qù Měiguó, tā qù le Zhōngguó.
He did not go to the United States, he went to China.
“没 (Méi) none” is used for objective narratives, negating that an act has taken place.
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