China called on major nations to “foster a free and facilitative trading environment” ahead of two summits next week that may herald a trade war with the European Union. Vice-Premier Zhang Guoqing said China was “steadfastly expanding high-standard opening up” in a videoconference hosted by French President Emmanuel Macron on Thursday. German Chancellor Friedrich Merz and Canadian Prime Minister Mark Carney attended along with representatives from Brazil, India, Italy, Japan, South Korea,...