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"China will firmly fight back at any move that interferes in its internal affairs," the spokesperson added.

"Cross-border e-commerce has just gone through two years of explosive growth," Wu said. "As the customs clearance mode for consumer goods develops, cross-border e-commerce will become even more cost-effective.

"China traditionally tends to opt for stability, including foreign exchange stability, at times of international turmoil, building up a reputation as a responsible international actor," said Kuijs. "At times of anxiety about the country's economic outlook, supporting the yuan also serves to prevent financial outflows."

"China's wide-ranging know-how and experience when it comes to the construction of hydroelectric plants is second to none given the nation had already installed 313 gW by the end of 2017," said Joseph Jacobelli, a senior analyst of Asian utilities at Bloomberg.

"China will continue its proactive participation in the global governance of the world's intellectual property," Chen was quoted by China Central Television as saying.