Hsieh will battle Pliskova's compatriot, two-times Wimbledon champion Petra Kvitova, for a place in Saturday's final after the second-seeded Czech despatched Slovakian Viktoria Kuzmova 6-4 6-0 in a one-side quarter-final lasting 62 minutes.
Kvitova, who was champion in Dubai in 2013 and runner-up at this year's Australian Open, sent down 21 winners and won 74 percent of her first serve points while making 12 unforced errors as she dominated from start to finish.
"I didn't give (Kuzmova) any time to do her job, maybe turn the match in her way," Kvitova said after the win.
"(Hsieh is) a tough and tricky opponent. I played her in Sydney in a really tough match. Will be probably some rallies tomorrow, and I need to be ready for every shot she's going to bring to the game."
On the other side of the draw, unseeded Swiss youngster Belinda Bencic ousted world number two Simona Halep 4-6 6-4 6-2 in a seesaw quarter-final.
Bencic, ranked 45th, broke Halep's serve seven times during Thursday's contest before claiming victory on her third match point as her Romanian opponent ran out of steam.
The 21-year-old will face defending champion Elina Svitolina in the other semi-final after the Ukrainian eased past Spain's Carla Suarez Navarro 6-2 6-3 in the day's last match.
(Reporting by Simon Jennings in Bengaluru)
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