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Meanwhile, Xi said issues of regional hotspots should be resolved properly "to help restore stability to Syria and other Middle Eastern countries at an early date and contain the rampant spread of terrorism."

Security and stability are the basis of economic cooperation among SCO member states, Jiang noted, adding that SCO expansion would help the alignment of China's Belt and Road Initiative with the development strategies of other SCO member states.

"They can exchange views on almost everything, which reflects the high levels of political trust between the two countries," Chen said.

The Kazakh-Chinese cooperation on cross-border transportation, a successful case of linking the two countries' development strategies, will bring economic prosperity and social well-being to those countries along the Belt and Road, said Nazarbayev.

China has a four-tier color-coded weather warning system, with red the most severe, followed by orange, yellow and blue.