2020-03-16People work at a construction site in Beijing on March 13, 2020. According to China Railway Beijing Group Co Ltd, more than 140 builders started work on the project from Feb 6, and there are over 1,500 workers on the site cumulatively through March 13. The company also took measures to reduce the risks of massive gathering and improve work efficiency. [Photo by Zou Hong/chinadaily.com.cn]People work at a construction site in Beijing on March 13, 2020. According to China Railway Beijing Group Co Ltd, more than 140 builders started work on the project from Feb 6, and there are over 1,500 workers on the site cumulatively through March 13. The company also took measures to reduce the risks of massive gathering and improve work efficiency. [Photo by Zou Hong/chinadaily.com.cn]People work at a construction site in Beijing on March 13, 2020. According to China Railway Beijing Group Co Ltd, more than 140 builders started work on the project from Feb 6, and there are over 1,500 workers on the site cumulatively through March 13. The company also took measures to reduce the risks of massive gathering and improve work efficiency. [Photo by Zou Hong/chinadaily.com.cn]People work at a construction site in Beijing on March 13, 2020. According to China Railway Beijing Group Co Ltd, more than 140 builders started work on the project from Feb 6, and there are over 1,500 workers on the site cumulatively through March 13. The company also took measures to reduce the risks of massive gathering and improve work efficiency. [Photo by Zou Hong/chinadaily.com.cn]Workers have their temperature taken before going the construction site canteen to have dinner on March 13, 2020. [Photo by Zou Hong/chinadaily.com.cn]Workers line up with one meter of distance to get a meal on March 13, 2020. [Photo by Zou Hong/chinadaily.com.cn]