As expected, head coach Gustavo Alfaro included Fenerbahce forward Enner Valencia and teenage Sporting Lisbon winger Gonzalo Plata in his 30-man squad.
The host squandered a promising chance after Axel Witsel failed to make the most out of Reyna's cutback pass into the penalty area.
Bayern stumbled and Hertha seized the chance to restore parity at 2-2 in the 72nd, after Cunha danced through the host's defence before beating goalkeeper Manuel Neuer into the top right corner.
Dilana took center stage early on by scoring seven points in a row, while Yang Shuyu provided much-needed help beyond the arc. The duo combined for 17 points in the first quarter to propel Dongguan to a 22-13 advantage.
Shanghai will face Shaanxi on Sunday, while Tianjin's opponents on Monday will be Jiangsu. Enditem
Like most media, Rangnick criticized that Bayern's latest transfers block spaces for the clubs promising youngsters such as Jamal Musiala, Chris Richards, and Joshua Zirkzee. Enditem
"I think I played a really good match. I was very aggressive. I knew from last year I had to change something, so I really wanted to be better than last year and definitely, I was today," said the world No. 2.
"We found several problems during the tournament and we will strengthen training in the future," he added.
With the result, Bayern Munich moves to the fourth position meanwhile Hertha Berlin suffered its second defeat to slip to the 13th position.
Sunday's win and the midweek victory against Valladolid were largely thanks to goalkeeper Thibaut Courtois, who produced man of the match performances in both games to keep Madrid's rivals at bay.
Baum's face spoke volumes after losing his first game as the successor to sacked manager David Wagner 4-0 against RB Leipzig.