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"Driven by the World Cup, trips to some niche places in Russia have also picked up, and thousands of Chinese tourists have shown an interest in traveling there," said Zhang Hao, director of Ctrip's themed tour department.

"Economic factors, including a stronger US dollar, slowing economic growth in China and capital control, no doubt held back some Chinese buyers," said Lawrence Yun, NAR's chief economist.

"Even though China's firm stance has prompted Trump to send all his top economic officials for trade negotiations to avert a trade war, it will be a tough talk between the two sides. Otherwise the Trump administration and the president himself will appear weak," said Tu Xinquan, a professor at the University of International Business and Economics.

"Facing a complicated and grim international situation and severe global economic recession, global trade and investment continues to be at a low ebb," Tang said.

"Effective policy communication, sound economic and trade relations and strong economic complementarity are favorable conditions for deepening China-Arab third market cooperation," it says.