John Higgins remained on course for a sixth Welsh Open title after brushing aside Zhou Yuelong in the quarter-final.
The Scot clinched three scrappy frames before making breaks of 75 and 67 to win the contest 5-0.
Higgins will meet Jack Lisowski in the semi-final after he defeated 2017 champion Stuart Bingham 5-2.
Lisowski stormed into a 4-0 lead in Llandudno, with breaks of 70 and 118, before Bingham wrestled two frames back.
But Lisowski, who won his first ranking title at the Northern Ireland Open in October, held his composure to seal victory.