Taiwan hopes to find a "natural way" to exchange views with Chinese President Xi Jinping at a summit of Asia-Pacific leaders that starts in Vietnam this week, the self-ruled island's envoy to the meeting said on Monday.

Relations between Beijing and Taipei have nosedived since President Tsai Ing-wen was elected last year. China believes she wants formal independence for Taiwan, a red line for Beijing.

For her part, Tsai says she wants to maintain peace with China but will defend Taiwan's democracy and security. China regards Taiwan as its sovereign territory.