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Before commencing an experiment, Bai would spend time reading the relevant papers and materials about the research and be thoroughly prepared for potential accidents.

Beijing's municipal authorities have called for grassroots prevention efforts, with hotlines opened for the public to supervise epidemic control work, according to a meeting on controlling the epidemic chaired by Beijing Party Secretary Cai Qi on Friday night.

Beijing's Qianmen area has enjoyed a history of over six centuries, remaining a rich source of historical and cultural legacies.

Because of global warming, Arctic ice is melting, opening up the possibility of an "Arctic shipping route". Shipping time between Northeast Asia and west Europe via the Arctic would be shorter than the existing one through the Indian Ocean and Suez Canal.

Before, the main way to use Alexa on a smartphone was through a separate Alexa app that lets users add skills and interact with?their Echoes. That app tracks voice search activity for the Echo but doesn’t have any voice interaction capability of its own.