Chinese 12-year-old Yu Zidi has won a bronze medal at the swim world championships, an astounding feat for a girl who would be a sixth- or seventh-grade student depending on the school system.

China’s Yu Zidi became the youngest ever medalist at the World Aquatics Championships after being part of China’s bronze medal-winning team in the 4x200m freestyle relay.

Chinese swimmer Yu Zidi, 12, has become the youngest medallist in World Aquatics Championships history after earning relay bronze in Singapore. The youngster, who will not turn 13 until October, swam in the preliminary rounds of the women’s 4x200m freestyle relay.