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Application of AI technologies to socio-economic development should be intensified to advance the industrialization of the technologies so as to create good momentum for the integration of technological innovations with industrial applications, Xi said.

Ardern arrived in Beijing on Sunday for a two-day visit to China. This is her first official visit to China since becoming New Zealand's prime minister in October 2017.

Apple Inc on Tuesday rolled out its much-anticipated iPhone X, a glass and stainless steel device with an edge-to-edge display that Chief Executive Tim Cook called "the biggest leap forward since the original iPhone."

Apple was the fastest-growing major smartphone vendor during the second quarter. It grew an impressive 32 percent year-on-year due to the continued popularity of the iPhone 11 series and price cuts.

Argentina, which holds the presidency of the G20 in 2018, wants to use the summit to send a clear message that the multilateral trading system, with the World Trade Organization at the core, must be upheld, he said.