Combo photo taken on May 3, 2020 shows technician Dang Kunyang checking the construction progress (left) and posing for a photo at the construction site of the Renhuai-Zunyi expressway in Zunyi, southwest China's Guizhou Province. Dang, 24, from Fuping County of Shaanxi Province, has been working as a technician for nearly 2 years. Many young workers have stuck to their positions during Labor Day holiday. (Xinhua/Liu Xu)