PRAGUE—Taiwanese government ministers were visiting the Czech capital on Monday accompanied by dozens of business and research representatives to boost trade and investment, a move that has angered China. Minister of National Development Kung Ming-hsin is leading a delegation of 66 officials representing business and research groups and organizations, including biotechnology, green energy, information technology, machinery, and tourism. Taiwanese Foreign Minister Joseph Wu will visit later in the week. The Chinese regime has protested, threatening unspecified retaliatory steps. Taiwan relies on such exchanges to counter the Chinese regime’s efforts to isolate the self-governing island that Beijing claims as its own territory, to be annexed by military force if it deems necessary. Taiwan is a de facto independent country, with its own military, democratically-elected government, and constitution. The Czech Republic, like most countries, has no formal diplomatic ties with Taiwan, but maintains robust informal contacts. Taiwan’s high-tech companies are also significant investors …