Wang defeats tearful Dart in Wimbledon third round
Dart, who knocked out compatriot and 32nd seed Katie Boulter earlier this week, could not hide her emotion before congratulating Wang, at 42 ranked 58 places above the Briton.
Wang had trouble at the start of the match coping with a swirling and chilly wind as well as her opponent's aggressive game.
The encounter was also disrupted by rain and it took until midway through the second set for the Chinese woman to settle into a rhythm and find her range.
Dart took the first set with a fierce cross-court winner, after breaking Wang's serve four times as both players struggled with the ball toss in the stiff breeze.
Wang, who reached the fourth round of the U.S. Open last year, settled her nerves and took the second set on her third set point with a volley winner.
She said she had trouble dealing with Dart's serve and her "super-flat" balls.
"I was getting a bit more used to her balls and all the slices. I felt more comfortable each time as the match was going," Wang said in a courtside interview.
The British number two, cheered by a partisan crowd, won the first three games of the third set but could not maintain her intensity and became increasingly frustrated by Wang's solid defence and tenacity.
Wang, who upset fifth seed Jessica Pegula in the second round, took advantage and reeled off the next six games, clinching the match with a determined volley winner.
She told the crowd she was looking forward to the fourth round and added: "Hopefully you cheer more for me next time."
Dart's defeat means Emma Raducanu, who reached the fourth round on Friday, is the only British player left in the draw.