"We haven't played for a long time. We played a bit tight today, but took our chance at last," said Shanxi coach Li Ge.
The win, which came as the 35th from 36 matches this season, also ties him with Rafael Nadal for a record 14th Roland Garros quarterfinals appearance.
Wang Lili made 11 of 20 field shots and scored 25 points for Xinjiang, one of the title contenders over the current campaign. Wang Siyu helped with 11.
The Spaniard, who is seeking his 13th title at Roland Garros, defeated Sinner 7-6 (7-4), 6-4, 6-1 to set up a rematch with Diego Schwartzman on Friday.
After registering a 30-point performance in Saturday's first round game, Shanxi captain Wu Tongtong expressed her gratitude to medical staff in fighting against the virus.
But Wu was reluctant to highlight her own performance.
Li Xiu led Wuhan with 14 points, but no other player scored in double figures. Wuhan was held to 3 of 26 shots beyond the arc.
World 10,000m bronze medalist Agnes Tirop of Kenya was second in 15:11.11 while Margaret Kemboi also of Kenya taking the third spot In 15:13.38. Ethiopian Tsigie Gebreselama (15:19.79) was fourth.
Their Canadian forward Christophe Lalancette completed his hat-trick in the final stretch to guide his team to a respected victory and the first place in the rankings, 4-5.
Thanks to the third-round win, Wuhan moved atop the championship group standings with six points.
A win for Barca would carry the positive feeling into the international break, but Sevilla will also look at this game as the chance to show they are title outsiders this season. Enditem