A worker works at the construction site of Chongqing-Zunyi expressway in southwest China's Guizhou Province, May 2, 2020. During the International Labor Day holiday, workers are accelerating the expressway construction under strict epidemic prevention measures. (Xinhua/Liu Xu)
Aerial photo taken on May 2, 2020 shows the construction site of Chongqing-Zunyi expressway in southwest China's Guizhou Province. During the International Labor Day holiday, workers are accelerating the expressway construction under strict epidemic prevention measures. (Xinhua/Liu Xu)
A worker works at the construction site of Chongqing-Zunyi expressway in southwest China's Guizhou Province, May 2, 2020. During the International Labor Day holiday, workers are accelerating the expressway construction under strict epidemic prevention measures. (Xinhua/Liu Xu)
Photo taken on May 2, 2020 shows the construction site of a grand bridge of Chongqing-Zunyi expressway in southwest China's Guizhou Province. During the International Labor Day holiday, workers are accelerating the expressway construction under strict epidemic prevention measures. (Xinhua/Liu Xu)
Photo taken on May 2, 2020 shows the construction site of a grand bridge of Chongqing-Zunyi expressway in southwest China's Guizhou Province. During the International Labor Day holiday, workers are accelerating the expressway construction under strict epidemic prevention measures. (Xinhua/Liu Xu)
A worker is seen at the construction site of Chongqing-Zunyi expressway in southwest China's Guizhou Province, May 2, 2020. During the International Labor Day holiday, workers are accelerating the expressway construction under strict epidemic prevention measures. (Xinhua/Liu Xu)
Workers are seen at the construction site of Chongqing-Zunyi expressway in southwest China's Guizhou Province, May 2, 2020. During the International Labor Day holiday, workers are accelerating the expressway construction under strict epidemic prevention measures. (Xinhua/Liu Xu)
Workers work at the construction site of Chongqing-Zunyi expressway in southwest China's Guizhou Province, May 2, 2020. During the International Labor Day holiday, workers are accelerating the expressway construction under strict epidemic prevention measures. (Xinhua/Liu Xu)
