Japan's Minami Katsu maintained a two-stroke lead at the LPGA Buick Shanghai with a 4-under-par round of 68 in the third round on Saturday. One day after setting the course record with a sizzling 61 at the Qizhong Garden Golf Club, Katsu carded six birdies and two bogeys to move to 17-under as she chases her first title on the LPGA Tour.