The victory also means Ni earned Luxembourg a spot at next year's Olympics in Tokyo. If she goes, it would be her fifth Games. The 31-year-old Yang was not born when Ni won world team championship gold for China in 1983.
Ni moved to Luxembourg in the 1990s, running a hotel with her husband. She kept competing, with a five-year break between 2002 and 2007, and set a record in 2017 for the longest table-tennis match at 1 hour 33 minutes.
Chinese-born players represent many countries in table tennis, including European Games gold and silver medalists, Fu Yu of Portugal and Han Ying of Germany.
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