Who will lead Taiwan for the next four years will be decided on Saturday, when over 19.5 million eligible voters head to the polls from 8 am. New legislators will also be chosen for the self-ruled island, which Beijing considers to be part of China that must be unified, by force if necessary. Amid a rapidly ageing population, Taiwan’s six-million young voters aged 20 to 39 are considered a key force that could sway the result. They played a crucial role in outgoing leader Tsai Ing-wen’s decisive victory for the Democratic Progressive Party (DPP) in 2020, when she was re-elected with more than …