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CHESTER COUNTY, United States - While US President Donald Trump sees an "economic enemy" in China, the northeastern US county of Chester in Pennsylvania sees an economic partner.

CREG, a unit of State-owned China Railway Group Ltd, focuses on the development and production of shield tunneling machines and tunnel boring machines. China used to completely rely on imports until 2008 when CREG independently developed its own shield tunneling machine after six years of research.

Calling for innovative concepts, content and methods, Xi told media groups to make use of new media's edge in publicity, amplify their voices on the international stage, tell stories about China well and build flagship media groups with strong global influence.

CNPC signed its first long-term deal with Houston-based Cheniere Energy to import US LNG in February. It has previously cooperated with many US-based companies, including Exxon Mobil Corp, Chevron Corp and ConocoPhillips Co.

Cang Wei and Fan Feifei contributed to this story.