US President Donald Trump is set to hold his first meeting with Chinese President Xi Jinping, in a high-stakes summit for both leaders.
The heads of the world’s two biggest economies will hold the bilateral at Mr Trump’s Mar-a-Lago retreat in Florida.
The American leader is expected to press his counterpart for action on North Korea, and Mr Xi to seek assurances on Taiwan.
Mr Trump tweeted last week that the summit “will be a very difficult one”.
Mr Xi and his wife, folk singer Peng Liyuan, will be treated to a welcome banquet on Thursday afternoon at Mr Trump’s palatial Palm Beach resort with the US president and first lady, Melania Trump.
The bilateral will conclude with a working lunch on Friday.
But there is unlikely to be any golf. While Mr Trump is fond of hitting the fairway, Mr Xi’s administration has cracked down on the sport in an anti-corruption drive.
All eyes will be on body language between the two leaders – one a softly spoken Communist Party apparatchik and the other a brash Manhattan property tycoon.
BBC China Editor Carrie Gracie says observers can expect an unpredictable power play from the very first handshake.
The Chinese are reportedly wary that the mercurial US president could embarrass Mr Xi, who faces a party congress in November, by some breach of protocol.
“Ensuring President Xi does not lose face is a top priority for China,” one Chinese official told Reuters news agency.
The Republican president’s blue-collar supporters will hope he can translate his China-bashing election rhetoric into concrete gains for American manufacturing workers.
Despite his tough campaign talk, Mr Trump has so far not followed through on his threat to formally brand China a “currency manipulator”, or to hit Chinese imports with punitive tariffs.
Mr Trump tweeted last week that the US could no longer tolerate massive trade deficits and job losses.
One of the most urgent issues for the US is nuclear-armed North Korea, which fired a missile into the Sea of Japan on Wednesday.
Pyongyang is openly trying to develop an intercontinental ballistic missile capable of hitting the west coast of the US.
Mr Trump is expected to call on Mr Xi to arm-twist North Korea into halting its nuclear programme by denying it access to banking institutions.
The US president told the Financial Times this week he was prepared to act unilaterally.
“If China is not going to solve North Korea, we will,” he said.
A senior White House official said Pyongyang would be a key test for the Trump-Xi relationship.
“The clock is very, very quickly running out,” the official said. “All options are on the table for us.”
Although Beijing has condemned the missile tests, it has been reluctant to isolate its neighbour, fearing its collapse could spawn a refugee crisis and leave the American military camped on its doorstep.
For his part, Mr Xi will seek assurances from Mr Trump on US arms sales to Taiwan, which China considers a breakaway province that must be reunified with the mainland.
Mr Trump outraged the Chinese in December when he took the unorthodox step of accepting a phone call from the Taiwanese president.
But the US president agreed to respect the “one China” policy in a telephone call with President Xi in February.
Climate change, which Mr Trump once dismissed as a Chinese hoax, and Beijing’s building of artificial islands in the disputed South China Sea, could also come up.
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