Chinese-Chilean table tennis player Zhiying Zeng - or Tania - made her Olympic debut at the 2024 Paris games at 58 years old.

It had been a long time coming: with her mother as a coach, she turned professional at the tender age of 12. She qualified for the Chinese national team but later moved to Chile, where she abandoned the sport for 30 years to focus on her businesses.
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The Covid-19 pandemic saw Tania Zeng get back into table tennis.

By 2023 she was the highest-ranked woman in the sport in Chile, representing the country in the South American Championship and Pan American Games before accomplishing her “lifelong dream” of Olympic qualification.

https://en.wikipedia.org/wiki/Zhiying_Zeng