Lee cruised to victory to disappoint the home fans in Yixing City, having earlier defeated Xiao Guodong in the semi-finals.
The first frame of the final was a close affair and Lee sunk the black to open up a lead.
He never relinquished it as he wrapped up the remaining three frames with little difficulty to take home the £10,000 prize.
Asian PTC2 semi-final results
Ding Junhui 4-2 Cao Yupeng
Stephen Lee 4-2 Xiao Guodong
Stephen Lee 4-0 Ding Junhui