![](http://www.ecns.cn/hd/2020/05/03/ec1d007bac094b4190ecef9f7a038df4.jpg)
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)
![](http://www.ecns.cn/hd/2020/05/03/277b27112dc14d73a716bca820094be3.jpg)
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)
![](http://www.ecns.cn/hd/2020/05/03/2420be87a07a45ef819d8c4de2fdbed3.jpg)
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)
![](http://www.ecns.cn/hd/2020/05/03/ead1bb8e275341539d4ab6748f1bb1e8.jpg)
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)
![](http://www.ecns.cn/hd/2020/05/03/a875db8738dc4138a385532a2da0341f.jpg)
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)
![](http://www.ecns.cn/hd/2020/05/03/cc0c58075e224473bfa1dfb7c8e6e78f.jpg)
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)
![](http://www.ecns.cn/hd/2020/05/03/245de21df79248a0a5367a6f5b5f77e9.jpg)
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)
![](http://www.ecns.cn/hd/2020/05/03/30f289444f8443bdaf70d3ed0f97723f.jpg)
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)