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More than 1,000 universities and colleges have opened such courses. Among them, over 200 high-quality courses can be found on MOOC platforms in the United States, Britain, France, Spain and the Republic of Korea.

The occasion inspires the participants via exchanges of ideas and insights, he said, calling for fostering global partnerships and creating a bright future of common development.

President Xi Jinping declared the opening of the horticultural expo on Sunday evening. The green development concept embodied by the expo should be spread to every corner of the world, he said while addressing the opening ceremony.

Last year, trade volume between China and Vietnam reached a record high of nearly 150 billion U.S. dollars, and China accounted for the largest number of foreign tourists in Vietnam, roughly 5 million people.

"The U.S. requests involve China's core interests and major concerns. They touch the bottom line and China will not compromise," said Wei Jianguo, executive deputy director of the China Center for International Economic Exchanges.