The result at the Maracana stadium lifted Flamengo to the top of their group with 12 points from five matches, three points ahead of second-placed Independiente.
Head coach Li Tie and his team will assemble for a five-day training camp in Shanghai starting from October 4. Star striker Wu Lei, who plays for Espanol in Spain, will not participate in the camp.
On the Beijing side, Shi Xiufeng and Ma Yina each contributed 14 points.
Zhang had just broke the national record in the preliminary final on Sunday night in a time of 52.90 seconds. She led in the first 50 meters in the final, but Yang raced ahead of her in the last moment.
Photo taken on Sept. 27, 2020 shows workers defrosting the track in the National Sliding Center in Yanqing Zone for the 2022 Beijing Winter Olympics, Beijing, capital of China. Construction of the National Sliding Center in Yanqing of Beijing has seen big progress that it began ice-making on Sept. 18 and is estimated to finish at the end of the month before China's national team train in the National Sliding Center in early October. (Xinhua/Zhang Chenlin)
Shandong's Ji Xinjie, who won the title in the men's 400m freestyle on Sunday, secured his second gold medal in the men's 200m freestyle in 1:47.42 on Monday.
To leave space for postponed matches, the Champions League's group phase's timeframe has been extended until January 28.
Flamengo entered the match with only three regular starters, having reported 16 positive coronavirus cases in their first-team squad last week. Head coach Domenec Torrent was also absent from the touchline at Allianz Parque because of the virus.
"I am really happy about my first round. I was facing another great champion today. The transition to clay and the cold conditions worked out pretty well," said Thiem.
"I really wanted to give an effort here. It's my Achilles that didn't have enough to properly heal after the Open. I was able to get it somewhat better, but just looking long-term in this tournament, will I be able to get through enough matches? For me, I don't think I could," said the three-time Roland Garros winner.
QINGDAO, China, Oct. 1 (Xinhua) -- Yan Zibei from Hubei won the men's 200m breaststroke in two minutes 12.14 seconds at the Chinese national swimming championships here on Thursday.