Wan Letian (; born 12 August 2004) is a Chinese swimmer.https://olympics.com/en/paris-2024/athlete/letian-wan_1945202 She competed in the women's 4 × 100 metre medley relay at the 2024 Summer Olympics, where she won a bronze medal. At the 2026 Asian Games, she took gold in the 50 metre backstroke in 27.47 seconds.

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