Open this photo in gallery: A busy shopping district is seen in Shenzhen, China, April 3, 2025.Getty Images/Getty Images As countries around the globe grapple with the fact they are now in an involuntary trade war with the world’s largest economy, China is maintaining an approach of calm defiance to U.S. President Donald Trump’s increasingly outlandish threats. After Mr. Trump’s “Liberation Day” tariffs prompted Beijing to impose a reciprocal 34-per-cent levy on U.S. imports, leading Mr. Trump on Monday to threaten an additional 50-per-cent tariff unless it is reversed immediately, China held firm, vowing to “fight to the end” and...