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"EV copper demand and related infrastructure accounts for about two-thirds of our expected growth forecasts between 2018 and 2030," said Oliver Nugent, a metals strategist at Citigroup.

"Every single doubt must be cleared up," he said.

"Diplomatic authorities of the two countries are maintaining communication on this issue," Lu said at a daily news briefing, calling on the two nations to "meet each other halfway" to facilitate a favorable environment for the visit. Lu made the remark in response to media reports that Abe plans to visit China as early as October.

"Digitization is further realizing the potential for the cross-border supply of services. E-commerce related services trade has now taken up an increasing share of the world trade in services," she noted.

"Due to external uncertainties such as the impact of COVID-19 pandemic and rising protectionism, the fragile supply chain of raw materials and the unstable supply channels have become even more vulnerable," said Li Xinchuang, Party chief of China Metallurgical Industry Planning and Research Institute.