Frenchman Alexander Levy held off a challenge from Tommy Fleetwood to capture the Volvo China Open by four shots.
The world No 282, who started the day three strokes clear at Genzon GC, had increased that advantage to five at the turn but a double bogey at the 15th gave Fleetwood fresh hope.
The Englishman kept the pressure on by making birdie at the par five 17th but Levy responded with one of his own after producing a brilliant and daring second shot over water.
He was given more breathing space when Fleetwood bogeyed the last and Levy capped off his first European Tour win in style with a superb second shot to three feet at 18.
His short birdie completed a round of 69 and gave Levy, who carded a brilliant 62 on Friday, a winning total of 19-under.
Fleetwood (68) finished solo second after Alvaro Quiros doubled bogeyed the last for a closing 72.
Francesco Molinari was fourth after a 67 while Henrik Stenson, Ian Poulter and Anders Hansen tied for fifth.
Hansen raced through the field with a nine-under 63 while Stenson produced a Sunday 65.
Sprayed with champagne
Levy, as is tradition with all French winners, was sprayed with champagne by his compatriots on the final green.
After his joyous soaking Levy said of his approach to the penultimate hole: "I see Tommy make a birdie on the 17th, but I like the pressure, and on the 17th, I'm thinking only to put my ball on the green. I had good confidence on that shot."
Levy, a good friend of Victor Dubuisson, said the victory of his fellow Frenchman in Turkey late last year had helped give him the confidence that he could claim a first win.
England's Danny Willett also had a day to remember as he scored a hole-in-one at the 12th to win a Volvo V40 car.
It was the second ace of the day, Marcel Siem of Germany holing his tee-shot at the eighth.