Liu Jiacen scored 22 points and earned 11 rebounds for Shanxi. Zhao Zhifang also registered a double-double of 12 points and 12 rebounds. Wu Tongtong, a member of Chinese women's national team, pocketed 21 points in the clash.
Inner Mongolia will meet Shandong on Sunday, while Hebei will face Shanxi on Tuesday. Enditem
The remaining matches in the eastern half of the draw are scheduled to be played in a centralized venue from November 18 to December 13. Enditem
Mainz failed to put up any resistance while Union relentlessly tripled their lead after Marvin Friedrich headed home Christopher Trimmel's free-kick in the 63rd minute for 3-0.
United had a dream start when Bruno Fernandes scored a second minute penalty, but soon dropped behind as Tanguy Ndombele and then Son Heung-min netted for Spurs.
The 31-year-old, who is to face No. 7 seed Petra Kvitova in the next match, also became the first Chinese singles player since Li Na in 2012 to reach the fourth round at Roland-Garros.
With starters back on court in the third quarter, Shanxi again pushed their lead back to double figures on Wu's three-point play with 2:50 left before going up 63-56 heading toward the final 10 minutes.
The club presented new signing Sergino Dest on Friday and the 19-year-old right back, who arrives from Ajax, is an option of starting on the bench on Sunday.
That performance has put Athletic coach Gaizka Garitano under pressure and both he and Machin need wins to assure they are still in their jobs after the international break.
Tianjin coach Liu Hao admitted as a young team, his side have a gap to Shanghai in terms of skill.
The match will be Iran's first game at the national level under the leadership of Dragan Skocic.