Bjork, who began the day in joint second at Beijing's Topwin Golf and Country Club, shot seven birdies to finish at 18-under for the tournament.

The 27-year-old edged out Otaegui who carded a final round of 67.

"It's tough to describe the emotions. I'm really happy and proud of myself the way I played today," Bjork, who claimed his first European Tour title in his 44th event, said.

"It's probably one of the best rounds of golf I ever played, the best round in the situation.

"I made pretty much no mistakes today, I'm super happy."

Jason Scrivener closed with a 70 to be best of the Australian contingent at 11 under and tied for 20th.

Bjork holds the trophy with volunteers after winning the China Open at Topwin Golf and Country Club. PHOTO: Lintao Zhang/Getty Images.

Andre Dodt carded a 69 to finish the week at nine under, along with Jason Norris (71).

Veteran Marcus Fraser was a shot further back after a final round 69.

Bjork began strongly with a birdie on the first hole and picked up further shots on the fourth and eighth. Four more birdies on the back nine helped him move into the lead.

"It's the final day and the pressure comes on and I still hit good shots on the way in," he said.

"I had a good feeling this morning, I was less nervous than I am before a big final round, I felt confident almost all the way.

"I guess it was meant to be today."

England's Jordan Smith (64) finished tied for third alongside compatriot Matt Wallace (68) and Spain's Jorge Campillo (67).