Shanghai led by as many as 35 points in the final period.
The arrival of the national quartet of Li Yueru, Yang Liwei, Huang Sijing and Li Yuan has made Inner Mongolia, playing in the WCBA for a second year, a rising powerhouse in the league.
Argentina will face Ecuador in Buenos Aires on Thursday and Bolivia in La Paz five days later.
Next up for Kvitova is Germany's Laura Segemund, who dispatched Spaniard Paula Badosa 7-5, 6-2 to advance. Enditem
Shanxi and Henan played out a close game, although Shanxi ultimately won 76-70. Shanxi led the game by 9 points after the first half, but Henan did very well to surpass Shanxi in the third quarter.
Mainz were unable to gain a foothold into the first half and had to wait until the 38th minute to get their first chance on target, as Jean-Philippe Mateta's header came close.
Paranaense reduced the deficit courtesy of a Renato Kayzer header but Everton Ribeiro put the result beyond doubt when he lashed home from 20 yards after combining with Giorgian de Arrascaeta.
Li shot 12 of 14 from the field to finish with 28 points, along with 14 boards, in Inner Mongolia's wire-to-wire victory, leading five players who finished with double-digit in points.
Fueled by Han Ziqi's eight straight points, Tianjin jumped into a 14-5 start, forcing Shanghai into a timeout.
Dubbed "Female O'Neal", Li Yueru was unstoppable in the paint in the first quarter, shooting five of five from the field to put Inner Mongolia up 24-10 as the quarter expired.
With the support of the Chinese Table Tennis Association (CTTA), international table tennis action is back after several months of activity suspension due to the COVID-19 pandemic.