Barty had her share of luck to make the tournament decider after losing her opening-round robin-match in straight sets to Aryna Sabalenka.
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.
Wang was a late replacement for original group-stage victor Madison Keys after the American withdrew from the semifinal with a left knee injury. China's top-ranked player, Wang had a tough time with clinging to her serves.
And with it comes a projected rise to No.15 in the world when the WTA rankings are released on Monday, positioning her well for an all-important top-16 seeding at January's Australian Open. Earlier this year, Barty, who took a break from her tennis career to play cricket. "So what I'll do is I'll just relax tomorrow".
Barty, who took a break from tennis earlier in her career to play cricket, has proved nearly unbeatable when she has won the first set this year as she has solidified her position in the world top 20.
Barty served out a thrilling first set in 37 minutes with an overhead smash and the second set proved to be a battle of patience for both players.
"It's been a great finish in China this week", said Barty, who completes her season in the best possible way.
Contesting 2018 Zhuhai at a career-high ranking of No.22 (first posted October 22, 2018), having broken Top 30 after the memorable Wuhan run, the Chinese claimed the 36th tour-level win of the season, the first she has registered 30 or more main draw victories in a single year.
"These matches are the ones that really count", Muguruza said.
Spurred on by home fans at the Hengqin International Tennis Center, Wang dominated the former world number one, winning 11 games in a row to take the match 6-2, 6-0 and set up a Sunday showdown against Ashleigh Barty.