South Korean YE Yang shot a bogey-free third round 68 to move a shot clear of the field at the Volvo China Open.
The USPGA champion was one of just three players not to card a bogey in difficult windy conditions in Suzhou, and holds a one-shot lead over Jamie Donaldson of Wales and Finn Mikko Ilonen.
The lead changed hands throughout the day, with Yang, Donaldson, Ilonen and overnight leader Kim Do-hoon of South Korea all clear at some stage.
"Today was bogey free but it was also tough to save par on a lot of occasions," said the 38-year-old Yang.
"Overall, it was difficult but I am very satisfied that I saved a lot of pars and it puts me in a good position on the leaderboard. Hopefully I can sustain my performance tomorrow."
The low round of the day came from Welshman Rhys Davies, whose bogey-free 65 included eagles on both the par fives on the back nine and lifted him 53 places up the leaderboard into a share of ninth on eight-under.
After winning his maiden title in Morocco last month, 21-year-old Challenge Tour graduate Davies produced a "special back nine" which included two eagles in three holes on the back nine.
"I have kept telling myself to be patient all week," said Davies, who chipped in from 70 yards and holed a mammoth 60 foot putt.
"I didn't play that badly over the first two rounds, but it wasn't quite happening. It wasn't quite happening on the front nine but it certainly did on the back nine."
Another Welshman, Stephen Dodd was the day's other player to avoid a bogey and he also shot up the leaderboard with a 66 that left him tied for fifth with Kim on 10-under.
"I am very happy. I played nicely from the start and really got it going in the middle," said 34-year-old Donaldson, who has just one top 10 to his name this year.
"It was a good solid day and I hit lot of fairways and a lot of green and gave myself a few chances.
"I dropped one shot and I think four birdies and one bogey is fair. It was a good days work, it was tough with the wind."