Yu Zidi made history last year aged 12 when she became the youngest-ever medallist at the swimming world championships. Now a teenager, she headlines China’s bid for Asian Games domination and has Olympic glory in her sights. The 13-year-old schoolgirl with a pixie haircut stunned the sporting world last year with a series of eye-popping times. At the 2025 World Aquatics Championships in Singapore she helped China reach the 4x200m women’s freestyle relay final. She did not swim in the final but...