It said it had evidence but did not provide it in the post.
Additionally, it said the time center is responsible for generating and distributing China’s standard time, as well as to provide timing services to industries such as communications, finance, power, transport and defense. It had provided guidance to the center to eliminate the risks.
“The U.S. is accusing others of what it does itself, repeatedly hyping up claims about Chinese cyber threats,” it said.
Western governments in recent years have alleged hackers linked to the Chinese government have targeted officials, journalists, corporations and others. The ministry’s statement could fuel tensions between Washington and Beijing, on top of trade, technology and Taiwan issues.
The U.S. Embassy did not immediately comment.
Meanwhile, one of China’s most important meetings begins Monday, as leader Xi Jinping and other ruling Communist Party elites gather in Beijing to map out the goals for the next five years.
The closed-door gathering — known as the fourth plenum — is expected to last four days and will discuss and put the final touches on China’s next five-year plan, a blueprint for 2026-2030.
The leaders are meeting at a time of heightened trade tensions between Washington and Beijing and just ahead of a possible meeting between Xi and U.S. President Donald Trump during a regional summit later this month.