The local hero took a seven-shot lead into Sunday’s final round and carded a 70 for a 17-under finish, six ahead of South Korea’s Hyeon Seo Kang.
Her other nearest challenger overnight, Norwegian Marianne Skarpnord, bogied three holes on the front nine as she struggled to muster a round of 73 which dropped her to end??ten strokes behind Feng in a five-way tie for fourth place.
Also ending the tournament in fourth was??Welsh 21-year-old Amy Boulden who holed seven birdies to go round in 70 at the Qizhong Garden Golf Club.
Young English player Charley Hull, last year???s European Order of Merit winner, went into the final round tied in fifth place but posted a round of 75 to drop away and finish on two under, tied in 18th place.
Feng in 2012 became the first woman from mainland China to win on the LPGA tour.