Five minutes later, the crossbar denied Dortmund a greater lead before the break, as Jadon Sancho's header bounced off the woodwork.
Bayern might face 55 games in 254 days if the Bavarians reach the finals in all competitions.
The ceremony was held in the gymnasium of the Xi'an Olympic sports center. "As a host city of the major events, Xi'an will spare no efforts in organizing each activity. We will make great memories and try our best to hold the 14th National Games without any problems," said Wang Hao, the vice president of the event's organizing committee.
Earlier in the day, Zhaxi Yangben came first in the men's 50km race walk, with the winning mark of 3:52.19. Wang Rui finished second in 3:55.48, followed by Gong Fanglong in 3:59.01.
17-year-old Giovanni Reyna said the title is essential while managing director Michael Zorc is tracking Manchester City talent Jamie Bynoe-Gittens.
The decisive point will be if the reluctant Swiss can set his bunch of youngsters on fire and at the same time close doors at the back.
Real Sociedad were a bit flat in their opening day 1-1 draw away to Real Valladolid, but should be sharper after that game and another week's training, and although the stands of the Reale Arena will again be devoid of fans on Sunday night, this should be a tough test of Madrid's ability to defend their title. Enditem
The capital city in China held a meeting on Tuesday to review the designing scheme of Beijing Workers Stadium renovation, with plans for this to be submitted to the Asian Football Confederation (AFC) in late September.
The forward recommends a 'one game at a time' policy for the struggling Royal Blues.
Cologne came out highly motivated after half-time and dominated proceedings, but still the "Billy Goats" squandered a number of chances.
The pair were then taken to Spurs' training ground in Enfield, where Bale was given a rapturous welcome by fans who had waited outside of the ground to greet him.