Defending champion Coco Gauff beat Eva Lys in straight sets to reach her third consecutive China Open semi-final.
The world number three took one hour and 28 minutes to overcome her German opponent 6-3 6-4.
The American, a two-time Grand Slam winner, broke Lys three times in the opening set, converting three of her four break point opportunities.
"I'm happy with how I played - she's a tough opponent and she hit some incredible shots on the run but I tried my best to play aggressive and good tennis," said Gauff.
"I think staying confident in my game [was important].