When Czechia’s second-highest official flew to Taiwan in June, he traveled on a commercial ticket. His own government had refused to lend him a state plane.On July 20, the speaker of the country’s lower house of parliament landed in Beijing on a government aircraft,...

Taiwan is one of the hardest places on Earth to invade. Its mountains, the seas that surround it, and its few usable landing beaches have defeated the plans of great powers before. But according to a Taiwanese security scholar, the island’s gravest danger is...