After a few years in the tennis wilderness, Jankovic returned with a bang last year, breaking back into the Top 10 thanks to a string of impressive showings. The Serbian has carried this form into 2014, finishing runner-up in Bogotá and reaching the semifinals in Brisbane, Doha, Stuttgart and Rome.
"I'm really looking forward to playing in Tianjin this year," Jankovic said. "It's always exciting when a new tournament is added to the calendar because it means we get to visit somewhere different.
"I always love going to China and have had a lot of success there in the past so it will be great to visit a new city. I believe Tianjin is ready for us."
The tournament, which will be held at Tianjin International Tennis Center from October 6-12, is the sixth and final stop-off in China on the WTA calendar, following on from the China Open, in Beijing.
"The tournament is delighted to welcome such a stellar playing field to the city of Tianjin," Tournament Director Tony Cho said. "With Jelena as our Top 10 player we have secured someone who is not only one of the best players on the planet, but who also very popular with the Chinese fans.
"Zhang Shuai has had great success of late and will no doubt look forward to playing in front of her home-crowd, while Peng Shuai continues her strong play having recently won the doubles title at Roland Garros and is currently part of the No. 1 doubles team in the world. Hantuchova and Hingis are both outstanding names in women's tennis and also have a very large following of fans in China."