With white hair, sunglasses and professional sportswear, Gu is greeted by many people as he goes past them.
World champion Daniel Stahl took his 13th consecutive victory in the men's discus, with the Swede throwing 67.28m.
Elsewhere, Belarus' fifth seed Aryna Sabalenka lost to compatriot Victoria Azarenka 6-1, 6-3, ninth seed Johanna Konta of Britain was stunned by Romania's Sorana Cirstea 2-6, 7-6 (5), 6-4 and tenth seed Garbine Muguruza from Spain lost to Bulgaria's Tsvetana Pironkova 7-5, 6-3.
He became a first-team regular under manager Renato Gaucho following the departure of Everton Soares to Benfica last month.
"But we are optimistic because we know we can do it because we have a fantastic partnership with Tokyo and an equally strong partnership with Beijing," he added.
The second-tier league will take place behind closed doors. In the first session, the 18 teams will be divided into three groups, which will follow the traditional home-away round robin format.
"I'm kind of scared how good she's going to be in the future," Osaka said. "My biggest takeaway from her game is that she didn't back down from me or from the speed of my ball, which for someone that young is kind of amazing."
"At the start of the season I was in great shape physically and mentally, I was ready to dominate track but unfortunately COVID-19 slowed me down. With Ostrava meeting opportunity now here, I will give it my best," said Chelangat who still harbors an Olympic Games ambitions next year.
Ruichang remains at second in the overall standings despite the win, while four-time CBSL champion Qingdao still leads the table.
"Oscar had a little leg discomfort during halftime break and the coaching group made some adjustment to protect him. We all know that he is the core of our team and his absence will certainly have an impact on our attack," said Shanghai defender Wang Shenchao, adding that the team will reflect on the failure and improve in the following games. Enditem
However Corinthians salvaged a point in the third minute of injury time when Jo capitalized on poor defending by side-footing a first-time effort past goalkeeper Roberto Fernandez after Leo Natel's cross from the right.