The US Department of Transportation has already started investigations into the matter.
The United States' State Department said it had contacted the two countries and called on them to "use the existing direct communication links between them to avoid further escalation".
The US has enjoyed 13 consecutive years of rising visitor numbers from China, 12 of them attracting double-digit growth.
The United Nations' top aid official has urged the Security Council to renew a mechanism that provides lifesaving assistance to millions of desperate people in northwest Syria through cross-border deliveries from Turkey.
The UAE said on Thursday it had joined a US-led coalition to protect waterways across the Middle East.
The United States should stop causing trouble in the South China Sea, respect international laws and China's sovereignty and refrain from making further provocative moves in the region, Chinese military experts said.
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The United Nations Security Council unanimously adopted a resolution on Tuesday endorsing the agreement between the United States and the Taliban aimed at ending the long war in Afghanistan.
The UNESCO is recommending the adoption of open education applications and platforms that schools and teachers can use to reach learners remotely.
The United States and Cuba officially resumed a diplomatic relationship in July 2015, more than five decades after they severed it.
The US supergroup on PAI development said in a statement Tuesday that Baidu has in recent years involved into a diverse technology conglomerate, with ventures in autonomous driving, smart assistants and AI platform services.