Athletes of China attend a training session before the World Athletics Relays Guangzhou 2025 in Guangzhou, south China's Guangdong Province, May 9, 2025. (Xinhua/Li Ming)

Akani Simbine (L) of South Africa attends a training session before the World Athletics Relays Guangzhou 2025 in Guangzhou, south China's Guangdong Province, May 9, 2025. (Xinhua/Li Ming)

An athlete of Denmark (R) attends a training session before the World Athletics Relays Guangzhou 2025 in Guangzhou, south China's Guangdong Province, May 9, 2025. (Xinhua/Li Ming)

Athletes of Botswana attend a training session before the World Athletics Relays Guangzhou 2025 in Guangzhou, south China's Guangdong Province, May 9, 2025. (Xinhua/Li Ming)