CHINA’S State Council Information Office has accused the United States of being the world's greatest violator of human rights.

The allegation coincided with Beijing warning of "countermeasures" if US House of Representatives Speaker Kevin McCarthy meets with a leading politician from the breakaway island of Taiwan.

In a new report published on Tuesday, titled US Human Rights Violations in 2022, the China highlighted that the US “has measures in place against more than 20 nations, including Cuba since 1962, Iran since 1979, Syria since 2011 and Afghanistan in recent years.”

Calling the US out as the most prolific enforcer of unilateral sanctions in the world, the report said that Washington pursues power politics in the international community, frequently uses force, provokes proxy wars and is a saboteur of world peace.

The report added that under the guise of anti-terrorism activities, the US has killed some 929,000 people and displaced about 38 million others in 85 countries.

Between 2017 and 2020, the US launched 23 proxy wars in the Middle East and Asia-Pacific region.

The report also condemned Washington for failing to close the Guantanamo Bay detention camp.

Hitting out at “an ugly chapter of relentless human rights violations,” the document slammed the US for holding 780 people at Guantanamo for years without trial while subjecting them to cruel and inhumane treatment.

Last year, independent experts of the United Nations Human Rights Council demanded the prison camp’s closure and the prosecution of those responsible for the crimes committed there.

Meanwhile, China threatened “resolute countermeasures” over a planned meeting between leading Taiwanese politician Tsai Ing-wen and Mr McCarthy during a visit to Los Angeles by Ms Tsai.

She claimed that the trip was a chance to show the island’s commitment to democratic values on the world stage.

“I want to tell the whole world democratic Taiwan will resolutely safeguard the values of freedom and democracy and will continue to be a force for good in the world, continuing a cycle of goodness, strengthening the resilience of democracy in the world,” Ms Tsai said.

Her meeting with Mr McCarthy is tentatively scheduled for April 5, when she is expected to stop in Los Angeles on her way back from meeting allies in Central America.

Zhu Fenglian, spokeswoman for the Chinese cabinet's Taiwan Affairs Office, denounced the planned stopover, saying: “We firmly oppose this and will take resolute countermeasures.”

The US should “take concrete actions to fulfil its solemn commitment not to support Taiwan independence,” she added.