Staff members of a power supply company check the facilities at night at a transformer substation in Suixian County of Shangqiu City, central China's Henan Province, Dec. 10, 2025.

The National Meteorological Center on Wednesday issued a blue alert for a cold wave and a separate blue alert for strong winds, forecasting a widespread drop in temperatures and the first large-scale snowfall this winter across northern China over the next few days. (Photo by Xu Zeyuan/Xinhua)