Aerial photo taken on May 18, 2022 shows workers sailing boats during an event celebrating the harvest season of crayfish in Xuyi County of Huai'an, east China's Jiangsu Province. Crayfish is one of the renowned specialties in Xuyi County. (Xinhua/Li Bo)

Workers net crayfish during an event celebrating the harvest season of crayfish in Xuyi County of Huai'an, east China's Jiangsu Province, May 18, 2022. Crayfish is one of the renowned specialties in Xuyi County. (Xinhua/Li Bo)

Workers net crayfish during an event celebrating the harvest season of crayfish in Xuyi County of Huai'an, east China's Jiangsu Province, May 18, 2022. Crayfish is one of the renowned specialties in Xuyi County. (Xinhua/Li Bo)

A worker nets crayfish during an event celebrating the harvest season of crayfish in Xuyi County of Huai'an, east China's Jiangsu Province, May 18, 2022. Crayfish is one of the renowned specialties in Xuyi County. (Xinhua/Li Bo)

A worker shows crayfish during an event celebrating the harvest season of crayfish in Xuyi County of Huai'an, east China's Jiangsu Province, May 18, 2022. Crayfish is one of the renowned specialties in Xuyi County. (Xinhua/Li Bo)

A worker shows crayfish in front of camera during an event celebrating the harvest season of crayfish in Xuyi County of Huai'an, east China's Jiangsu Province, May 18, 2022. Crayfish is one of the renowned specialties in Xuyi County. (Xinhua/Li Bo)

A worker shows crayfish during an event celebrating the harvest season of crayfish in Xuyi County of Huai'an, east China's Jiangsu Province, May 18, 2022. Crayfish is one of the renowned specialties in Xuyi County. (Xinhua/Li Bo)