The US accusation of "erosion of Hong Kong's autonomy" is a biased and groundless smear attempt driven by political motives, the spokesman said.
The US first lady also held roundtable talks with teachers and some officials.
The US operation, called Broad USA and headed by Sunny Wang, is based in Hackensack, New Jersey.
The US and Cuba had a similar arrangement for decades before Barack Obama's government restored diplomatic relations with the island nation.
The US space agency hopes to put Americans on the moon again by 2024. Congress has provided .5 billion to the agency in fiscal year 2019, which, adjusted for inflation, is NASA's best budget in a decade, according to Casey Dreier, chief advocate and senior space policy adviser of the Planetary Society in California.
The US Centers for Disease Control and Prevention recently changed its COVID-19 testing guidelines, according to which most people without symptoms are no longer advised to get tested, even after an exposure to someone known to have the virus.
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The US tech giant said it brought in .2 billion in China in the quarter, down from nearly billion during the same period in 2017.
The United States also briefly banned companies from selling goods to ZTE.
The US Senate did not condemn violent crimes, it said, but supported criminals in the name of "human rights" and "democracy", which showed the US Congress' extreme hypocrisy toward human rights and democracy, holding double standards with anti-China intentions designed to plunge Hong Kong into chaos.
The US Treasury in April already banned 38 Russian individuals and entities, including seven business leaders and 17 senior officials, for their alleged "malign activity" around the world.