Briefing reporters in Beijing on Tuesday, Chinese Foreign Ministry spokesperson Hua Chunying accused the US of having a "nature of bullying" and of "fabricating various kinds of China threat theories".
The warning was broad but pointedly delivered in Hungary, a NATO ally and European Union member where Huawei is a major player.
Hua also dismissed calls from members of the Uighur Muslim ethnic group to post videos of their relatives who have disappeared into internment camps.
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The social media campaign, launched Tuesday under the hashtag #MeTooUyghur, follows the release of a state media video showing famed Uighur musician Abdurehim Heyit, who many believed had died in custody.
"China has more than one billion people, do we need to release a video of everyone?" Hua said, after she said media and sources that claimed Heyit had died were false news.