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At a news briefing, White House Press Secretary Kayleigh McEnany said that a vaccine before the end of the year is the goal.

Assorted technological achievements in virtual reality, robotics, artificial intelligence, cloud computing, big data and new energy are being showcased at the Light of the Internet Exposition Dec 2 to 6, part of the fourth World Internet Conference in Wuzhen, Zhejiang province.

Aside from his productive pen, Xinhua has taken a close look at the other life of writer Michael Dobbs, executive producer for the American version of his book.

At 5 am the next day, they started to cross Zheduo Mountain, 4,298 meters above sea level, with other hikers. Although Zhang and his son suffered altitude sickness, they dared not stop for fear they might not reach the campsite where they planned to sleep before it got dark.

Asked to comment on Mnuchin's reluctance to reduce tariffs, Douglas Paal, a nonresident scholar at the Carnegie Endowment for International Peace, said: "I think he understands tariffs have served their purpose and need to be phased out, but cannot say so openly because of Trump's obsession with tariffs."