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Analysts believe China will become a major market for such technologies as the government expects 50 percent of new vehicles sold in the country by 2020 to have some form of self-driving functions.

Analysts at Cowan Group, a New York investment bank, estimate that about half of the world's aircraft fleet is grounded.

And more than 200 enterprisers from both sides are attending the fair which covers an exhibition area of more than 11,300 square meters in Guangzhou Poly World Trade Expo Center to seek opportunities for expansion of cooperation and trade.

Andrew Smith, a professor of political science at the University of New Hampshire and director of the school's survey center, said Harris's attack on Biden wasn't a surprise.

Analysts say there are hopes a visit to the United States beginning Tuesday by a high-ranking Chinese official will ease trade tensions and maintain steady bilateral ties.