Lu Jingjing was the defending champion, but lost to the 3rd seeded Tetiana Luzhanska in the first round.
Karolína Plíšková was the defending champion, but lost in the semifinals to Dominika Cibulková.
Zheng Saisai was the defending champion, and successfully defended her title, defeating Han Xinyun in the all-Chinese final, 6–4, 3–6, 6–4.
Anna-Lena Friedsam is the defending champion, but decided not to participate this year.
Anna-Lena Friedsam was the defending champion, but chose to participate in Mallorca instead.
Jelena Janković was the defending champion, but chose to participate in Florianópolis instead.
Chang Kai-chen and Zheng Saisai were the defending champions, but Zheng chose not to participate this year. Chang played alongside Duan Yingying, but lost in the first round to Nicha Lertpitaksinchai and Peangtarn Plipuech.
Zheng Saisai was the defending champion, but chose not to participate.
Dominika Cibulková was the defending champion, but lost in the second round to Heather Watson.
Duan Yingying was the defending champion, but lost in the first round to Arina Rodionova.
İpek Soylu and Xu Yifan were the defending champions, but did not participate this year.
Karolína Plíšková was the defending champion, but lost in the third round to Catherine Bellis.
Han Xinyun and Zhu Lin were the defending champions, but chose not to participate together. Han partnered Vera Zvonareva, but lost in the semifinals to Duan Yingying and Wang Yafan. Zhu played alongside You Xiaodi, but lost in the first round to Prarthana Thombare and Xun Fangying.
Jiang Xinyu and Tang Qianhui were the defending champions and successfully defended their title, defeating Lu Jingjing and You Xiaodi in the final, 6–4, 6–4.
This was the first edition of the tournament.
Shuko Aoyama and Yang Zhaoxuan were the defending champions, but Yang chose not to participate. Aoyama played alongside Duan Yingying, but lost in the semifinals to Eri Hozumi and Zhang Shuai.
Caroline Wozniacki was the two-time defending champion, but lost in the second round to Camila Giorgi.
Belinda Bencic was the champion the last time the event was held in 2017, but chose to compete in St. Petersburg instead.
Duan Yingying and Wang Yafan were the champions the last time the event was held in 2017, but chose not to participate together. Duan partnered Kaitlyn Christian, but they lost in the first round to Mona Barthel and Sara Sorribes Tormo.
