This photo taken on May 13, 2025 shows fireflies at Tianhe Park in Guangzhou, south China's Guangdong Province. Fireflies here have become active, attracting people to watch and take photos. (Xinhua/Xiao Ennan)

This photo taken on May 13, 2025 shows fireflies at Tianhe Park in Guangzhou, south China's Guangdong Province. Fireflies here have become active, attracting people to watch and take photos. (Xinhua/Xiao Ennan)

This photo taken on May 13, 2025 shows fireflies at Tianhe Park in Guangzhou, south China's Guangdong Province. Fireflies here have become active, attracting people to watch and take photos. (Xinhua/Xiao Ennan)

People watch fireflies at Tianhe Park in Guangzhou, south China's Guangdong Province on May 13, 2025. Fireflies here have become active, attracting people to watch and take photos. (Xinhua/Xiao Ennan)

People take photos of fireflies at Tianhe Park in Guangzhou, south China's Guangdong Province on May 13, 2025. Fireflies here have become active, attracting people to watch and take photos. (Xinhua/Xiao Ennan)

This stacked photo taken on May 13, 2025 shows fireflies at Tianhe Park in Guangzhou, south China's Guangdong Province. Fireflies here have become active, attracting people to watch and take photos. (Xinhua/Xiao Ennan)

This stacked photo taken on May 13, 2025 shows fireflies at Tianhe Park in Guangzhou, south China's Guangdong Province. Fireflies here have become active, attracting people to watch and take photos. (Xinhua/Xiao Ennan)