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Concertina wire, added by US Army troops, is seen covering the US-Mexico border wall in Nogales, Arizona on Feb 6, 2019. [Photo/IC]

Committee Chairman Senator Roger Wicker of Mississippi also brought up restrictions on Twitter against Trump. He told Dorsey that Twitter "allows foreign dictators to post propaganda, typically without restriction" yet "you typically restrict the president of the United States''.

Commsat CEO Xie Tao said he plans to establish some of the satellite ground stations in countries and regions involved in the Belt and Road Initiative, and provide them services at low prices. He said users could share data or keep it confidential, depending on their preferences.

Compared with the traditional shipping route, the rail service takes less time and involves fewer changes in trains during the long journey.

Companies don't value their reputation until there is a crisis, said Rachel Catanach, president and senior partner of FleishmanHillard in charge of the China market.