It is reported by RIA Novosti with reference to China Central Television.
The Chinese diplomat urged the US "not to escalate tensions."
He also stressed that the Chinese authorities will resolutely protect the interests and dignity of the PRC.
Beijing reserves the right to take further necessary action.
Earlier, Republican Senator Marco Rubio called China's balloon a signal of US weakness.
It was also reported that US Secretary of Transportation Pete Buttigieg allowed the imposition of sanctions against China because of the situation with the balloon.