By Humeyra Pamuk

WASHINGTON (Reuters) -U.S. Secretary of State Antony Blinken goes to Beijing this weekend with expectations low that he will make headway on the long list of disputes between the United States and China. But he and his Chinese counterparts can achieve at least one thing, say analysts - show that the world's most important bilateral relationship is not about to fall off the rails.

Blinken will hold meetings in China on June 18-19 and may meet with Chinese President Xi Jinping, sources said. He will be the highest-ranking U.S. government official to visit China since Biden took office in January 2021.

In a pre-trip briefing on Wednesday, U.S. officials said they have no expectation the trip will yield a breakthrough in how the U.S. and China deal with each other. That followed a tense evening phone call with Blinken on Tuesday during which Chinese Foreign Minister Qin Gang told the U.S. to stop meddling in China's affairs.

China's foreign ministry followed up on Friday, warning that "vicious competition ... cannot be engaged in" and that the United States "should not fantasise that it is dealing with China from a position of strength."

"This is not so-called responsible competition, but extremely irresponsible hegemonic behaviour which will only push China and the U.S. towards confrontation," foreign ministry spokesperson Wang Wenbin told reporters.

The visit, which could set the stage for a flurry of other diplomatic engagements including a meeting between Xi and U.S. President Joe Biden later in the year, would show that the two rivals have not given up on diplomacy.

"Both sides want to show the rest of the world that they are managing the relationship responsibly," said Andrew Small, a senior fellow at the German Marshall Fund’s Asia program.

"For China, the most important audience is the global south. For the U.S., it's partners and allies. So even going through the motions has some utility for both Washington and Beijing."

Bilateral ties have deteriorated across the board, raising concerns that their rivalry could veer into conflict over Taiwan, which China claims as its own. China has been staging regular military drills near the island, including on Sunday.

"Facing the situation in the Taiwan Strait, I have repeatedly stressed that we will not escalate conflicts let alone provoke disputes, but we will firmly defend national sovereignty," Taiwan President Tsai Ing-wen told senior naval officers on Friday.

The United States and China are also at odds over issues ranging from trade and microchips to human rights.

Particularly worrisome for China's neighbors has been its reluctance to allow regular military-to-military talks between Beijing and Washington, despite repeated U.S. attempts. U.S. officials said on Wednesday that setting up crisis communication channels to reduce risk was a top priority.

"Anything that would lead to greater cooperation, greater dialogue and a lessening of tensions between Beijing and Washington is to be welcomed," U.N. spokesperson Stephane Dujarric told reporters on Wednesday.

While Blinken's main goal will be "candid, direct and constructive" discussions, the U.S. officials said, breakthroughs are not likely on any major issues, including the flow of fentanyl precursors and Americans detained in China.

EYEING BIDEN-XI MEETING

A meeting on the sidelines of a G20 summit last November in Bali briefly eased fears of a new Cold War, but following the dispute over an alleged Chinese spy balloon in February, high-level communication between the countries has been rare.

Beijing, frustrated by what it sees as the Biden administration's weaponization of economic policies, has sought to expand ties with countries in Europe, the Middle East and Africa. Xi has recently received several European leaders including French President Emanuel Macron and made a diplomatic push to court others, including U.S. ally Saudi Arabia.

U.S. officials expect Blinken's visit will pave the way for more bilateral meetings in the coming months, including possible trips by U.S. Treasury Secretary Janet Yellen and Commerce Secretary Gina Raimondo.

"Beijing agreed to the visit because it seems to be the one thing that is blocking many other things, such as working-level dialogues and the visits by other cabinet members," said Yun Sun, director of the China Program at the Stimson Center think tank in Washington.

Those meetings could lead to one between the countries' leaders when they attend a September G20 meeting in India and the November Asia-Pacific Economic Cooperation (APEC) summit in San Francisco.

"Xi does want to come to San Francisco," said Sun. "(Aside from) APEC, he also wants a bilateral with Biden. That means the groundwork must be paved starting from now."

(Reporting by Humeyra Pamuk; Additional reporting by David Brunnstrom in Washington and Laurie Chen, Martin Pollard in Beijing, Michelle Nichols in New York and Ben Blanchard in Taipei; Editing by Don Durfee and Daniel Wallis)