From Taiwan to Tibet, French President Emmanuel Macron has touched Beijing’s nerves on a range of sensitive issues over the past few weeks. On a trip to Japan earlier this month, he and Japanese Prime Minister Sanae Takaichi “emphasised the importance of peace and stability in the Taiwan Strait and urged a peaceful resolution of cross-strait issues through constructive dialogue”. The irritation for Beijing was less about the language and more about the timing, with the joint statement coming...