The world no 5 conquered the windy conditions and played some impressive shots to race into an imposing lead at the Qizhong Garden Golf Club.
Feng, on 12 under par at the halfway stage is comfortably clear of Xiyu Lin of China and first round leader Stacey Keating from Australia, while Norwegian Marianne Skarpnord and South Korean Hyeon Seo Kang were a stroke further behind.
Conditions were tougher than the first round and scores were generally higher due to winds of 15-20 miles per hour throughout the day.
Playing under grey skies, in temperatures up to 26C, Feng bogeyed the second hole but immediately recovered with birdies on the third, fourth, eighth, ninth, 14th and 17th holes.
???Today the conditions were tougher than yesterday but the greens were still kind of a little softer which helped a lot, because the wind picked up,” Feng said. “I misjudged the wind a few times for distance and made a three putt on the second hole, but I made two birdies right after it and I was back in the game. I think five under was a pretty good score today.???
Earlier in the day, Keating followed her first round 63 with a 75 containing a double bogey on the second, five bogeys and four birdies. She said: ???It was obviously very different score wise, but it was very, very tough out there today. It was blowing an absolute gale from my second or third hole. Three over is not the best score but I did make some birdies out there.???