China says that the "true reason" behind a visit by Taiwan President Tsai Ing-wen to the United States, a stop on her way to firm up ties with Guatemala and Belize, is to "seek breakthroughs and promote her Taiwan independence agenda. Last year, a visit by former US House Speaker Nancy Pelosi to Taiwan sparked an angry response from Beijing, with the Chinese military conducting drills at an unprecedented scale around the island. IMAGES AND SOUNDBITES