Wang began playing tennis aged nine as a way to keep fit. A former U16 and U18 national champion, she made WTA qualifying debut at 2007 Beijing and main draw debut at 2012 Baku. In 2013 she claimed her first Top 10 win in Kuala Lumpur: as a qualifier, she completed a comeback victory over Caroline Wozniacki after saving a match point. In November 2014, she climbed for the first time into the Top 100. That year she reached at the Us Open the second round for the first time in a major: she still awaits her first 3r showing.
In 2016, she posted a 14-1 record between March-May on the ITF Circuit, winning $50k ITF/Quanzhou-CHN and $100k ITF/Shenzhen-CHN, and finishing runner-up at $75k ITF/Gifu-JPN. She ended 2016 at No.70 after reaching quarterfinals in Shenzhen (l. A.Radwanska), Kuala Lumpur (l. Zhu), Hong Kong (l. Wozniacki) and at WTA 125k Series event at Dalian (l. Min).
In 2017, she won the biggest title of career in April, at WTA 125K Series event in Zhengzhou (d. Peng in F). She also reached quarter-finals in Shenzhen (l. Giorgi), at Premier-level Dubai (l. Sevastova) and International-level Kuala Lumpur (l. Han). She climbed into the Top 50 following Rome run and celebrated in Madrid the R16 (l. Kuznetsova), her best performance at a Premier Mandatory tournament. The Chinese enjoyed a successful Asian swing, reaching the semifinals in Hong Kong (l-Pavlyuchenkova), the quarterfinals at Tokyo [Japan Open] (l. Fett), and R16 in Wuhan (l. Karolina Pliskova).
2018 was her first top-20 season. She opened her campaigh with first round exits at Shenzhen and Australian Open. In Indian Wells, she reached the round-16 at a Premier Mandatory tournament for the second time in her career (l. Halep) after 2017 Madrid (l. Kuznetsova).
After a streak of disappointing results, prior to Roland Garros she made her first quarterfinal of the season in Strasbourg (l. Barty). In Paris, she enjoyed her best result at Roland Garros by reaching the third-round (l. Putintseva). On grass, she only contested Wimbledon, falling in the first-round (l. Zheng Saisai). Everything changed after the grasscourt season as she lifted her first tour-level title in July in Nanchang (d. Zheng Saisai via ret. w/fatigue).
She achieved her best result at US Open with a third-round showing (l. Svitolina), then she did not drop more than four games in a single match in Guangzhou title, becoming the fourth Chinese woman to win the title in the tournament's 15-year history after Li (2004), Yan (2005) and Zhang (2013 and 2017). She dropped just 18 games total en route to the title at Guangzhou, the fewest games lost in winning a WTA singles title in 2018.
In the Asian swing, after a semifinal-run in Hiroshima, she completed her best win by ranking as she defeated No.7 Pliskova in Wuhan where she reached her first semifinal at WTA Premier-level or above (retired vs. Kontaveit w/left thigh injury). She also moved to the semifinals in Beijing (l. eventual champion Wozniacki) and finished runner-up in Hong Kong (l. Yastremska). She made the first apperarance in Zhuhai. Despite coming second in the group, she took the alternate place in the semifinals after Keys’ withdrawal with a left knee injury and won the final 11 games of the match to upset Muguruza and claim her 37th tour-level win of the season. Wang, who hadn't registered 30 or more main draw victories in a single season before, lost to Barty in her fourth career final.