Xi Jinping addressed a forum in Beijing, called the Conference on Dialogue of Asian Civilisations.

China will only be more open to the world, President Xi Jinping said on Wednesday, as he denounced as "stupid" those who believe in cultural superiority, in his first public address since trade tension with the United States spiked last week.

China and the United States are locked in an escalating trade war, with both levying tariffs on each other's imports. Just before Xi spoke, the government reported surprisingly weaker growth in retail sales and industrial output for April.

China on Monday announced higher tariffs on $60 billion worth of US goods, effective on June 1, in retaliation for a US decision on Friday to raise levies on $200 billion worth of Chinese imports.

Xi was addressing a forum in Beijing organised by the propaganda ministry, called the Conference on Dialogue of Asian Civilisations. He made no direct reference to the trade tension nor to the United States, focusing instead on presenting China as a non-threatening country open to all.

Chinese civilisation was an "open system" that had continuously had exchanges and learned from other cultures, including Buddhism, Marxism and Islam, Xi told the forum.

"Today's China is not only China's China. It is Asia's China and the world's China. China in the future will take on an even more open stance to embrace the world," he added.

No country could stand alone, Xi said, perhaps taking an indirect swipe at U.S. President Donald Trump's "America First" policy.

"Civilizations will lose vitality if countries go back to isolation and cut themselves off from the rest of the world," Xi said.

"The people of Asian countries hope to distance themselves from being closed, and hope that all countries will adhere to the spirit of openness and promote policy communication, connectivity and smooth trade."

SUSPICION

China has been particularly upset by comments reported in the U.S. media last month by a State Department official who said the United States was involved in "a fight with a really different civilisation" when it came to China.

Xi told the forum that civilisations were not destined to clash.

"It is stupid to believe that one's race and civilisation are superior to others, and it is disastrous to wilfully reshape or even replace other civilisations."

Xi offered no new concrete measures to open China up, aside from proposing an Asia tourism promotion plan, and even on that he gave no details.

Officials have billed the forum as part of a soft power push to put a gentler face on China's growing might, though it only attracted a handful of foreign leaders to the opening session, at which Xi spoke, including the presidents of Greece, Sri Lanka and Singapore.

China has faced opposition to some of its global ambitions, mainly in the West but especially in the United States, where there has been suspicion of Chinese technology, Xi's Belt and Road Initiative to re-create the Old Silk Road, and government-run Confucius Institutes to teach the Chinese language.

China has also faced criticism for its tight cyber controls - though forum organisers unblocked the internet for foreign media - and for a controversial re-education campaign for Muslims in its far Western region of Xinjiang.