Weather issues earlier in the week pushed the tournament schedule back and Hsieh saw her first-round match Wednesday suspended by rain after just three games.
She opened her play Thursday by getting past Kurumi Nara 6-7 (5-7), 6-3, 6-4 in 2 hours, 42 minutes. Hsieh forced 26 break opportunities on Nara and converted seven of them against five breaks by Nara.
Hsieh, seeded second, was more efficient in her second-round match, beating Zhang Shuai 6-2, 6-2 with only one dropped service game. She was still going strong at the end, getting three breaks in the second set.
No. 3-seeded Anastasia Pavlyuchenkova was on the court little more than an hour in defeating Akgul Amanmuradova 6-3, 6-3. She didn't see a break point, losing just 14 points in nine games serving. Fourth-seeded Ayumi Morita ran past Nudnida Luangnam 6-3, 6-1, winning 60 percent of the points in the match.
Karolina Pliskova ousted fifth-seeded Misaki Doi 6-4, 7-6 (9-7) and Luksika Kumkhum posted an easy 6-2, 6-4 upset of No. 7-seeded Eleni Daniilidou.
Also Thursday, Patricia Mayr-Achleitner beat Wang Qiang 6-3, 6-2; Ashleigh Barty was a 7-6 (7-3), 6-4 winner over Zarina Diyas; and Bethanie Mattek-Sands advanced 6-1, 6-4 over Duan Ying-Ying.