BEIJING/WASHINGTON (Reuters) - Chinese President Xi Jinping told U.S. President-elect Donald Trump that cooperation was the only choice for relations between the world’s two largest economies, with Trump saying the two had established a “clear sense of mutual respect”.

There has been intense speculation over the impact of Trump’s win on issues facing the two countries, from global trade and climate change to the security balance in the Asia-Pacific.

Trump lambasted China throughout the U.S. election campaign, drumming up headlines with his pledges to slap 45 percent tariffs on imported Chinese goods and to label the country a currency manipulator on his first day in office.

His election has injected uncertainty into relations at a time when Beijing hopes for stability as it faces daunting reform challenges at home, slowing growth and a leadership reshuffle of its own that will put a new party elite around Xi in late 2017.

In their first interaction since the U.S. election, Chinese state media said Xi told Trump in a telephone call on Monday that as the world’s largest developing and developed economies, there were many areas where China and the United States could cooperate.

“The facts prove that cooperation is the only correct choice for China and the United States,” China Central Television (CCTV) cited Xi as saying.

Xi’s remarks were a reiteration of phrasing typically used by Beijing to describe bilateral relations.

The two sides must “promote the two countries’ economic development and global economic growth” and “push for better development going forward in China-U.S. relations”, Xi said.

“During the call, the leaders established a clear sense of mutual respect for one another, and President-elect Trump stated that he believes the two leaders will have one of the strongest relationships for both countries moving forward,” a statement from Trump’s presidential transition office said.

The two agreed to maintain close communications and meet soon, CCTV said. Xi had congratulated Trump in a message delivered shortly after his surprise election victory last week.

The Global Times, a nationalist tabloid published by the ruling Communist Party’s People’s Daily newspaper, said if Trump slapped China with heavy tariffs it would “paralyze” bilateral trade.

“When the time comes, large orders for Boeing planes would switch to Europe, U.S. auto sales in China would face setbacks, Apple phones would essentially be crowded out, and U.S. soybeans and corn would be eradicated from China,” the paper said in a commentary.

“Trump, coming from a business background, is very astute. We do not believe he will treat China-U.S. trade so childishly.”

China has signaled it will promote plans for regional trade integration, vowing to seek support for a Beijing-backed Asia-Pacific free trade area at a summit in Peru later this month, after Trump’s win dashed hopes for the U.S.-led Trans-Pacific Partnership (TPP).

Trump’s criticism of U.S. allies, including Japan, for free-riding on U.S. security guarantees, has deepened anxiety among Washington’s allies about its commitment to post-war security arrangements in the face of a rising China and volatile North Korea.

Trump appears to be seeking quick ways to withdraw the United States from a global accord to combat climate change, which has been billed by China and U.S. President Barack Obama as a key area for cooperation.