President Obama hosts Chinese Vice-President Xi Jinping

US President Barack Obama has pressed China's leader-in-waiting on trade and human rights, as he welcomed him to the White House.

Meeting Vice-President Xi Jinping in the Oval Office, Mr Obama also said it was "vital" that Washington maintained a strong relationship with Beijing.
Mr Xi said he hoped his visit would deepen mutual understanding and friendship between the two powers.
The US and China have been at odds over trade, currency and human rights.
Mr Xi, 58, is widely expected to succeed China's President Hu Jintao, who must retire as head of the Communist Party later this year and from the presidency in 2013.
'Critical issues' Washington has been putting pressure on Beijing over what it sees as unfair trade practices, as well as the value of its currency and intellectual property theft.

"We want to work with China to make sure that everybody is working by the same rules of the road when it comes to the world economic system," said Mr Obama, flanked by Mr Xi.

"That includes ensuring that there is a balanced trading flow not only between the United States and China but around the world."
Mr Xi's trip comes amid concerns over a clampdown by Beijing on protests in Tibet. Human rights activists staged a protest outside the White House as China's vice-president arrived.
"On critical issues like human rights we will continue to emphasise what we believe is the importance of recognising the aspirations and rights of all people," Mr Obama added.
He also said that China's "extraordinary development" over the last two decades had brought "increased responsibilities".
The leaders were expected to discuss foreign policy issues, including Syria and Iran. But Washington also hopes to learn more about the Chinese heir apparent's leadership style, say correspondents.
Mr Xi is making a week-long trip as the guest of US Vice-President Joe Biden, who made a high-profile visit to China late last year.
Earlier in the day, Mr Xi met Mr Biden and Secretary of State Hillary Clinton at the White House's Roosevelt Room.

Mr Biden said that while "we are not always going to see eye to eye", both nations would speak "candidly" about their differences.
Mr Xi will meet Defence Secretary Leon Panetta, too. On Wednesday, he is due to travel to Iowa to meet his hosts from his first visit to the US in 1985 when he was a county official.
He is also scheduled to visit a farm in Iowa on Thursday before flying to Los Angeles, California, to meet business leaders there.
Mr Xi will reportedly also attend a Los Angeles Lakers basketball game on Friday.
'Frictions and differences' Correspondents say the US-China relationship has become an increasingly delicate one over a series of security and economic issues.
Mr Xi's visit comes a year after President Hu's trip to Washington, which he referred to in his comments provided by the Chinese government to The Washington Post.
In his remarks to the newspaper, Mr Xi sounded a note of warning to the US over its presence in the Pacific. He said scaling up military activity was not what the region wanted to see.
China and the US, Mr Xi said, had ''converging interests'' in the region and there was ''ample space'' for both in the Pacific Ocean.
"We also hope that the United States will fully respect and accommodate the major interest and legitimate concerns of Asia-Pacific countries," he wrote.
In his remarks to the newspaper, Mr Xi also emphasised that China had taken ''active steps'' to address US concerns over trade.
''Frictions and differences are hardly avoidable in our economic and trade interactions,'' he said. ''We must not allow frictions and differences to undermine the larger interests of our business co-operation.''
Mr Xi is also scheduled to visit Ireland and Turkey, following the US trip.