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China has a four-tier flood control emergency response system, with level I representing the most severe.

Vietnamese Prime Minister Nguyen Xuan Phuc, whose country chairs the ASEAN rotating presidency, also sent a congratulatory letter to the opening ceremony.

Xi stressed the need to put people first, and value people's lives most in the combat against floods. He also underscored the necessity to coordinate epidemic prevention with flood control and disaster relief work, combine prevention preparations with emergency response, strengthen flood monitoring, and promptly identify risks.

The meeting urged efforts to step up basic research in mathematics, physics, chemistry and biology, and encourage teenagers to learn and explore basic theories.

Fengjie, a county in Chongqing where the Kuimen gateway to the magnificent gorges of the Yangtze River is located, gained its reputation as the "city of poetry," as poets, military figures and politicians in history wrote extensively about the forbidding landscape of rapid currents and narrow waterways.