After record levels of expansion over the past few years, China’s high-speed rail network – already the world’s largest – is set for further upgrades, as Beijing pledges to improve services and lower logistics costs over the coming half a decade.China added 10,000km of operational high-speed rail tracks between 2021 and 2024, putting the nation on track to reach its goal of 50,000km by the end of the year, Minister of Transport Liu Wei said at a press conference in Beijing on Monday.“The...