If that holds up, Serena will face higher-ranked players earlier at the Australian Open, while Barty won't.
"I know that whenever I have played Q in the past, it's always been an extremely tough match", Barty told WTA Media.
The Australian grew into the semi-final against Germany's Goerges, seeded fifth, and dominated the third set to book her place in Sunday's final.
Barty, however, took her chance to break in the seventh game and saw out the victory in 83 minutes.
While Barty flourished, Wang sprayed the ball wide and long all too often and, although she got back into the set, nothing was going to stop her opponent moving ahead. This year's total prize money is US$2.35 million (RM9.7 million) across the singles and doubles tournaments. Additionally, she reaches the career-high ranking and an all-important top-16 seeding at 2019 Australian Open.
"It's been a great finish in China this week", Barty said after Sunday's win.
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The win marks the third title of Barty's career and the second of 2018, following a win at Nottingham earlier this year.
But Wang hit back with two breaks of her own to reduce the deficit to 4-3, only to give her serve away in a lengthy eighth game.
"It has been a phenomenal year, it really has".
She took full advantage - taking down world No.14 and defending champion Julia Goerges in the semi-final before beating Wang in the decider, collecting $828,000 for her week's work.
The Queenslander defeated Caroline Garcia in straight sets in her second match; the Frenchwoman then went on to beat Sabalenka in straight sets in their clash to allow Barty to sneak into the semifinals. In the title match, she will aim to seal the 20th win in six events on home soil in 2018.
The win caps another strong year for Barty who had started 2017 ranked 325 in the world after a two-year sabbatical from the game and spending time playing cricket.