Nuremberg threw every man up front but Eintracht Frankfurt protected their lead to the end to secure their berth in the second round.
The lower league side had their goalkeeper Jakub Jakubov to thank as he defused the promising efforts on target from Andrej Kramaric and Christoph Baumgartner before the break.
"There wasn't a gap and if you use your elbows to open it up, I think it's completely against the rules," Van Aert said.
Paulinho put Yang Liyu's cross home in the 27th minute to break the deadlock.
R&F ran riot in the dying minutes as new sign 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.
Brazilian forward Hulk increased Shanghai's lead early in the second half with a header from full-back Wang Canchao's exquisite cross to make it 2-0.
The 2020 CBSL run from August 27 to September 14 in Chengdu. Due to the impact of the COVID-19 pandemic, all games were played behind closed doors. Enditem
The Champions League finalists kicked off their league title defence on Thursday with a shock 1-0 defeat at newly-promoted Lens, in a game which Tuchel fielded several young players such as 18-year-old league debutants Kays Ruiz-Atil and Arnaud Kalimuendo and 20-year-old goalkeeper Marcin Bulka, who was just making his second appearance for the first team.
It was the first time Everton had won away to a top six team (Spurs finished sixth last season) in 40 attempts.
Born in 1990, Radonjic is 1.90-meter-high and has both Croatian and German nationalities.
Jiangxi dominated the game at the beginning as Andy Russel put the newly-promoted side ahead in the 10th minute through a close-range header.