Taiwan's main opposition party chairwoman, Kuomintang's Cheng Li-wun, is planning a high-stakes trip to mainland China. The visit, which could include a meeting with Xi Jinping, is drawing significant scrutiny in Taipei.

A high-stakes visit to mainland China by the chairwoman of Taiwan’s main opposition party Kuomintang (KMT), during which she is expected to meet Communist Party leader Xi Jinping and promote cross-strait peace, is under scrutiny in Taipei. Cheng Li-wun is set to depart for Shanghai on Tuesday for a six-day trip, with local media reporting a possible meeting with Xi in Beijing on Thursday – the first such encounter between the two parties’ leaders in a decade. However, Cheng’s coming visit has...