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Apple Inc's decision to limit iPhone purchases from its online stores in China is an indication of the supply chain constraints being faced by the US tech giant, as the novel coronavirus outbreak has disrupted normal operations at upstream suppliers and electronic component manufacturers, experts said.

As China's drinking culture has changed, Chinese consumers in general are consuming more alcohol, said Snow Chen, senior cultural strategy consultant at market research company Kantar.

Arne Sorenson, CEO of hotel operator Marriott international, told the Financial Times that companies and conferences were choosing to host events in other countries "due to the uncertainty over restrictions on entry" to the US.

As 5G radio waves travel at much higher frequencies, and so have less range, the density of 5G base stations will have to be far higher than 4G, just to cover the same area, meaning that total spending on 5G will be far higher than that of 4G, Wang added.

Araujo noted Chile will host the upcoming 25th session of the Conference of the Parties (COP25) to the UN Framework Convention on Climate Change in December, and Brazil is ready to contribute to the gathering.