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Beijing Bytedance Technology, the world's highest valued tech startup and the operator of popular short video platform Douyin, unveiled a scientific short video program to encourage institutions, researchers and individuals to actively post on Douyin in a move to popularize science and improve the public's understanding and appreciation of science.

Beijing Meteorological Service and Beijing Municipal Commission of Planning and Natural Resources jointly issued the blue alert at 4 am, warning people of mudflows, landslides and collapses in the city's mountainous areas in the next 24 hours.

Beijing traffic police said the driver surnamed Qi, 22, drove the unlicensed forklift truck that was forbidden to run on main roads in urban areas.

Before the declaration, the two countries signed 16 agreements on Saturday to boost cooperation in scientific research, justice, poverty relief, healthcare and customs clearance. The signings were witnessed by Premier Li Keqiang and Pakistan's Prime Minister Imran Khan.

Before his telephone conversation with President Xi Jinping, US President Donald Trump said last week that he believed they would reach "a great deal" on trade but warned billions of dollars' worth of new tariffs would be added if a deal did not materialize.