Aditi had a nightmarish start with four bogeys in first five holes and she had two more on 14th and 15th to be six-over. She had her only birdies of the day on 17th and 18th to turn in 75 to lie T-117.
Meanwhile, Thai girl Thidappa Suwannapura (65) took sole lead as she had a sensational back nine with seven birdies and two bogeys in her round.
Defending champion In-Kyung Kim was one of four players who took advantage of the morning's calm conditions, carding a five-under par, 66 to get a fine start.
Later in the day, Thai girl, Thidappa Suwannapura (65) overtook them all to take sole lead.
Kim started her day on the back nine where she made five birdies over a six-hole stretch. Her only mistake of the day came with a bogey at the par 4, 5th hole but she bounced back with a birdie at the par 4, 9th, her final hole of the day.
Tseng, former World No. 1, and a 15-time winner on the LPGA Tour, whose last victory came in 2012, shot a bogey-free, 66 for her low round of the year and best round on Tour since February, 2017.
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