On the margins of a glitzy security event in Bavaria, the foreign ministers of France and Germany revived a dormant diplomatic format with China. In what was described as part of a larger effort to prevent the world’s superpowers from picking Europe apart, France’s Jean-Noel Barrot and Germany’s Johann Wadephul hosted Chinese Foreign Minister Wang Yi on Friday. It revived a configuration not seen since the days of French President Emmanuel Macron’s first term, talks that Wang said were “both an...