Lin, who has had two years of semi-retirement, won 21-9 21-10 to regain the title he last claimed in 2012.

The 32-year-old said "I want to show everyone that (in Rio this summer) at 33 I will still be able to do it."

In the women's final, Nozomi Okuhara of Japan beat China's Wang Shixian 21-11 16-21 21-19.