At age nine, Wang started playing tennis. That year, she became the promotion player for the Tianjin National Tennis Center. For two years consecutively (2006, 2007), she won the Junior's Tennis Championship in China. She officially started touring the ITF Women's Circuit in Japan as of 2007.
She made her Grand Slam main-draw debut at the 2014 US Open from the qualifying tournament, and defeated Paula Kania of Poland in the first round by 6–2, 6–0, before losing to Australian Casey Dellaqua in the second round.
2018: Asian Games gold medalist, two WTA titles, world No. 20
Wang also won her first WTA International titles in 2018. Her first came in July at Jiangxi, where she defeated Zheng Saisai in the final. The second one came in September at Guangzhou, where she dropped only four games throughout the tournament. As a result of her Guangzhou triumph, she reached a new career-high ranking of world No. 34 and replaced Zhang Shuai as the highest-ranked Chinese player.
The next week, she competed at the Premier-5 tournament in Wuhan, where she defeated Maria Sakkari, eighth seed Karolína Plíšková, and Daria Gavrilova in the first three matches. In the quarterfinals, she defeated 2016 Olympic gold medalist Monica Puig in straight sets to reach the semifinals, but was forced to retire from the match against Anett Kontaveit due to injury. She became the first ever Chinese player to reach the semifinals at the tournament, and reached another new career-high ranking of No. 28.
Wang received a wild card into the China Open in Beijing. As a Wuhan Open semifinalist, she received a first-round bye at the China Open. She first faced 2017 French Open champion Jelena Ostapenko in the second round and defeated her by 6–0, 6–0. In the third round, she defeated Karolína Plíšková for the second time in two weeks in straight sets. In the quarterfinal, she defeated Wuhan Champion Aryna Sabalenka in two very tight sets. Her run eventually ended in the semifinal, at the hands of former world No. 1 Caroline Wozniacki. Her semifinal result earned her a new career-high ranking of No. 24.
Wang was seeded sixth in Hong Kong. She defeated Zhang Ling and Christina McHale to reach the quarterfinals, where she faced top seed Elina Svitolina. Wang took a decisive lead quickly, taking the first set 6–2 and was leading 5–2 in the second when the match was suspended for the night due to a sudden downpour. She closed out the set 6–4 the next day, advancing to the semifinal. In the semifinal she defeated fourth seed Garbiñe Muguruza in three sets, coming back from a 1–4 deficit in the third to win 7–5. She made her third final of the year, where she faced 18 year old Dayana Yastremska, and was defeated in straight sets. On 22 October, she reached a new career-high ranking of No. 22.
She was originally awarded a wild card to enter WTA Elite Trophy, but with withdrawals from both Serena Williams and Jelena Ostapenko, she qualified for the main draw with her ranking. In her first round-robin match, she lost to Daria Kasatkina in three sets. She then played Madison Keys, winning the match in three sets 1–6, 6–3, 6–1. Later, Keys, as the leader of the group, announced her withdrawal due to a knee injury, allowing the second-placed Wang to play the semifinal match against Muguruza, where she won in straight sets 6–2, 6–0. In the final, she was defeated by Ashleigh Barty. Her performance in Zhuhai saw her break the top 20 for the first time, and ensured she would end the year as world No. 20.
2 The first Premier 5 event of the year has switched back and forth between the Dubai Tennis Championships and the Qatar Total Open since 2009. Dubai was classified as a Premier 5 event from 2009–2011 before being succeeded by Doha for the 2012–2014 period. In 2015, Dubai regained its Premier 5 status while Doha was demoted to Premier status. The two tournaments have since alternated status every year.