New Arsenal signing Willian chipped in with two assists as Gabriel, another Brazilian debutant, netted the second with a header shortly after the break before Arsenal captain Pierre-Emerick Aubameyang rounded off an easy win before the hour.
R&F ran riot in the dying minutes as newly signed Song Wenjie forced Ji Xiang to score an own goal in the 88th minute, four minutes before Chang Feiya scored the leveler with a volley.
The Bayern defeat led to new elections for club President being called for March, Ronaldo Koeman replacing Quique Setien as coach, the start of a mass dressing room clear-out and Leo Messi saying he wanted to leave.
The proposed new regulation are only applied to 400m, hurdle races and 800m, which Semenya dominates. Enditem
But the stories of the toe-to-toe clash were far beyond the records. A brawl in stoppage time saw five players sent off, including PSG's star Neymar, who has just come back from a COVID-19 quarantine.
Marcelo Bielsa's Leeds United will be fascinating to watch after the master tactician earned promotion last season, although Leeds could suffer from a lack of goals.
Chang'an Athletic found the pace in the second half after Yang Hao made the equalizer in the 61st minute after collecting Wei's long pass.
Leo played the Africa Cup of Nations in 2015, representing Cameroon. In his career, he had 12 appearances for the 'Lion of Africa'.
He came back from the injury at the beginning of the year, but following the outbreak of coronavirus, his return was postponed by a few months.
A total of 13 teams will play in two groups in the round-robin preliminaries with the top four finishers from each pool to qualify for the knock-out stage. Enditem
Photo taken on Sept. 13, 2020 shows a press conference for the 2020 Chinese National Athletics Championships in Shangyu District of Shaoxing City, east China's Zhejiang Province, on Sept. 13, 2020. (Xinhua/Jia Yuchen)