While the U.S. deals with the novel coronavirus, racial injustice and a presidential campaign, tensions with China continue to unfold. WSJ’s Gerald F. Seib explains. Photo: Wang Zhao/Agence France-Presse/Getty Images BEIJING—Chinese imports from the U.S. rose for the first time since the new coronavirus emerged earlier this year, showcasing Beijing’s post-pandemic purchasing power even as political tension between the world’s two largest economies continues to rise. China’s appetite for meat and other agricultural goods helped Chinese imports of U.S. goods to jump by 11.3% in June from a year earlier, after a 13.5% drop in May, data from Beijing’s General Administration of Customs showed Tuesday. The Chinese buying helped to narrow Washington’s…