The 27-year-old Chinese player will meet 40th-ranked Uzbekistan player Guirukhbegim Tokhirjonova, who beat ninth-seeded Russian Valentina Gunina 3-1 in their round-of-16 match in this World Chess Federation (FIDE) event.

The 19-year-old Uzbek player beat 25th ranked Russian Alina Kashlinskaya in the first round before defeating China's eighth-ranked Tan Zhongyi, who lost her world title to Jun in May.

Another former world champion, 26-year-old Mariya Muzychuk of Ukraine - who won the title in 2015 and lost it in 2017 - has had better fortunes in Russia and joined Ju as an early quarter-final qualifier.

Muzychuk, world ranked seven, will now meet Kazakhstan's 15th-ranked Zhansaya Abdumalik, who beat Poland's Jolanta Zawadzka 2½-1½.

Muzychuk's 28-year-old sister Anna, world ranked four, beat Antoaneta Stefanova of Belarus 2½-1½ to earn a last-eight meeting with fifth-ranked Russian Alexandra Kosteniuk.

The home player defeated India's Dronavalli Harika 3½-2½.

The last quarter-final will be between Russia's third seed Kateryna Lagno and China's 22nd-ranked Lei Tingjie.

Elsewhere, the two contestants in the FIDE Men's World Chess Championship in London, defending champion Magnus Carlsen of Norway and challenger Fabiano Caruana of the United States, were having a rest day after drawing their opening two matches.