The former World No.1 Chinese surrendered the match due to an injury, which she faced during her semi-final clash against current No.1 Carolina Marin of Spain.
The 25-year-old Li lost 14-21, 16-21 to the 2014 and 2015 world champion Carolina on Thursday.
The Japanese won her first Superseries title at the 2015 Japan Open.
In 2016, the 21-year-old won the prestigious All England Open tournament, becoming the first Japanese woman player to achieve this feat in the last 39 years.
Okuhara lost her semi-final match against P.V Sindhu on Thursday.
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