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As the monthly immigration rate in May reached its highest point in a decade, and as a result Trump threatened to impose a general tariff on Mexican imports, Mexican President Andres Manuel Lopez Obrador promised to "take unprecedented steps" to increase enforcement to curb irregular migration.

As the only one of its kind in China, the base has filled the gap in science practice education base that combines the fields of space, astronomy, geology, meteorology and new energy, Liu said.

As time goes by, ancient books suffer wear and tear and, in the worst situations, are damaged by worms and/ or gnawed by rats. What can be done to save such valuable books? Ancient-book restorers are able to solve the problem. Zhao Ling, who works at Hangzhou Public Library, is an expert in repairing ancient books. She puts much effort into repairing "weak" ancient books, so they can regain their beauty and be passed on to future generations. Zhao has oft been referred to as a person who "rescues history."

As prospects remain unclear in 2020, continued efforts should be made to reinforce the foundation of economic development, said Zhang Liqun, a researcher with the Development Research Center of the State Council.

As the reform efforts attract more overseas-listed Chinese tech firms to go public in the mainland, domestic investors will welcome more high-quality investment targets, said Dong Dengxin, director of the Finance and Securities Institute at the Wuhan University of Science and Technology.