With temperature dipping well below -30 Celsius in some cities of northern China, photos about frozen pants attracted national attention and discussion in China on Feb. 8 /Photo via Xinhua News and  Weibo

The owner of the pants is one of the plumbers on the rails in Jiamusi, northeast China's Heilongjiang Province, who works to secure the water supply on trains. /Photo via Xinhua News and Weibo

To make sure the water supply system can operate properly, the plumbers have to release water to prevent the pipes getting frozen. If the sluices and taps break, the team changes them immediately. After completing this task one day, a worker stepped out of the waist-high hole and his pants were so frozen he was forced to take them off. /Photo via Xinhua News and Weibo

The photos have stirred a lot of discussion on social media in China, with many people airing their concern about the plumbers' health. /Photo via Xinhua News and Weibo