Mao pins worn by Chinese athletes may test Olympic rules

United States players kneel prior to their women's soccer match against Australia at the 2020 Summer Olympics, Tuesday, July 27, 2021, in Kashima, Japan. (AP Photo/Fernando Vergara)

Chinese paramilitary policemen put on sunglasses while on duty, as spot lights light up Tiananmen Gate with its iconic portrait of late Chinese leader Mao Zedong in Beijing on Thursday, July 15, 2021. (AP Photo/Ng Han Guan)

Shanju Bao, left, and Tianshi Zhong, of China, celebrate their gold medals during a ceremony for the track cycling women's team sprint finals at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Izu, Japan. (AP Photo/Christophe Ena)

Shanju Bao of Team China celebrates winning the gold medal in the track cycling women's team sprint finals at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Izu, Japan. (AP Photo/Christophe Ena)

Raven Saunders, of the United States, poses with her silver medal on women's shot put at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. During the photo op at her medals ceremony Sunday night, Saunders stepped off the podium, lifted her arms above her head and formed an “X’ with her wrists. Asked what that meant, she explained: ”It’s the intersection of where all people who are oppressed meet.” (AP Photo/Francisco Seco)

China's Lijia Gong, center, poses with her gold medal after winning women's shot put next to Raven Saunders, of the United States, left, silver medal, and New Zealand's Valerie Adams, bronze medal, at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Francisco Seco)

Shanju Bao, left, and Tianshi Zhong of Team China hug with their gold medals during a medal ceremony for the track cycling women's team sprint finals at the 2020 Summer Olympics, Monday, Aug. 2, 2021, in Izu, Japan. (AP Photo/Christophe Ena)