Things got worse for Ole Gunnar Solskjaer's team as Anthony Martial was sent off for lashing out at Erik Lamela, and Harry Kane and Son made it 4-1 before halftime.
Without Li Yueru protecting the rim, Hebei trimmed the deficit to six points midway through the second quarter, but it was the closest they would come. Li responded by scoring eight points from the bench. Inner Mongolia held their nerve to build a 46-31 halftime lead.
It was also the 96th victory at Roland Garros for the Spaniard, who is seeking a 20th Grand Slam title to equal Roger Federer's record.
The French champions will kick off the continental campaign at home against Manchester United on October 20.
As expected, head coach Gustavo Alfaro included Fenerbahce forward Enner Valencia and teenage Sporting Lisbon winger Gonzalo Plata in his 30-man squad.
After leading 65-61, Shanxi rode on a 10-3 surge midway through the last quarter and withstood Hebei's comeback afterwards.
It was a case of one in and one out for Atletico Madrid, who lost midfielder Thomas Partay to Arsenal after the Premier League club paid the 50 million euro buyout clause of the Ghanaian international.
Serge Aurier added a fifth soon after the break, and a Kane penalty 10 minutes from time rounded off the scoring in a game that could leave Solskjaer's job at risk.
With the result, Union Berlin move up to third place in the standings, while Mainz stay 17th after suffering their third straight defeat of the new season.
After four games of the season, Athletic Club Bilbao coach Gaizka Garitano has emerged as the early favorite in the 'sack race' after his side lost 1-0 at home to nine-man Cadiz, before being beaten by the same score away to Alaves on Sunday.
Inner Mongolia will meet Shandong on Sunday, while Hebei will face Shanxi on Tuesday. Enditem