World No.5 Saina defeated Japan's Akane Yamaguchi 21-12, 22-20 in 42 minutes to bag her third women's singles crown of the year. She had also won the India Grand Prix Gold in January and the Australian Open Super Series in June.
"I was surprised to see the scores by which Akane beat Sun Yu and Bae Yeon Jun. I was not expecting to beat three Chinese in a row. I will remember this title for the rest of my life," said Saina, who was seeded sixth in the $700,000 event.
"Each year I used to wonder if I would ever win the China Open because it is such a difficult event. The crowd was lovely. It was a special feeling to see a full house crowd cheering for both of us."