1 / 4   Workers are still on duty at a power plant in the city of Huaian in east China’s Jiangsu Province during this Labor Day holiday. /VCG Photo

2 / 4   Several people were seen working on top of a 180-meter-high chimney at Huaneng Power Plant. /VCG Photo

3 / 4   To reduce the adverse influence on the ground, workers have to dismantle part of the energy-consuming facility ahead of a controlled demolition, so they need to spend their day on top, including their lunch time. /VCG Photo

4 / 4   The plant is going to remove its thermal power stations, with the aim of saving energy and reducing pollution./VCG Photo