Feature: U.S. partnerships with China mushroom despite trade frictions

Li Song, founder of the contract research organization (CRO) Frontage, introduces professional equipment at the company's lab in Chester County in Pennsylvania, the United States, July 9, 2018. While U.S. President Donald Trump sees an "economic enemy" in China, the northeastern U.S. county of Chester in Pennylvania sees an economic partner. (Xinhua/Wang Ying)