Cheng Chao-tsun (; born 17 October 1993) is a Taiwanese track and field athlete who competes in the javelin throw. His personal best of 91.36 m, set in 2017, was the Asian record until it was broken by Arshad Nadeem at the Paris Olympics in 2024.
Competition record Representing 2009Asian Youth GamesSingapore2ndJavelin throw (700 g)71.97 mWorld Youth ChampionshipsBrixen, Italy21st (q)Javelin throw (700 g)63.21 m2010Asian Junior ChampionshipsHanoi, Vietnam2ndJavelin throw73.26 mWorld Junior ChampionshipsMoncton, Canada8thJavelin throw71.58 mYouth Olympic GamesSingapore12th (B)Javelin throw (700 g)65.94 m2011Asian ChampionshipsKobe, Japan11thJavelin throw67.86 m2012Asian Junior ChampionshipsColombo, Sri Lanka1stJavelin throw74.68 mWorld Junior ChampionshipsBarcelona, Spain16th (q)Javelin throw67.88 m2013UniversiadeKazan, Russia23rd (q)Javelin throw65.38 m2014Asian GamesIncheon, South Korea5thJavelin throw81.61 m2015Asian ChampionshipsWuhan, China7thJavelin throw73.71 mUniversiadeGwangju, South Korea4thJavelin throw79.35 m2017Asian ChampionshipsBhubaneswar, India6thJavelin throw80.03 mWorld ChampionshipsLondon, England22nd (q)Javelin throw77.87 mUniversiadeTaipei, Taiwan1stJavelin throw91.36 m2018Asian GamesJakarta, Indonesia5thJavelin throw79.81 m2019Asian ChampionshipsDoha, Qatar1stJavelin throw86.72 mWorld ChampionshipsDoha, Qatar10thJavelin throw77.99 m2021Olympic GamesTokyo, Japan30th (q)Javelin throw71.20 m2023Asian ChampionshipsBangkok, Thailand7thJavelin throw69.54 mAsian GamesHangzhou, China10thJavelin throw67.03 m2025Asian ChampionshipsGumi, South Korea15th (q)Javelin throw70.80 m
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