TAIPEI - Japan “crossed a red line” with comments by its new leader suggesting a potential military intervention over Taiwan, Chinese Foreign Minister Wang Yi said Sunday.

Chinese state media reported some of what was discussed in the phone call that took place on Monday, local time.

Xi told Trump in a phone call Monday that Taiwan’s return to mainland China is “an important part of the post-war international order," according to China’s official news agency Xinhua. A White House ...