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"The future of space exploration lies in international cooperation. It's true for us, and for the United States too," according to the senior astronaut.

A country does not need anyone else to recognize whether it is a market economy or not, Long said, stressing the European Parliament resolution is in essence protectionist and anti-globalization.

To better understand the situation of China and the rest of the world, they should not be disparaging toward themselves nor repeat others' words without thinking, he said.

Xi said China attaches great importance to Russian President Vladimir Putin's visit to China later this year.

Such uNPRecedented practices will generate enormous power and broad space for developing theory, he added.