Calculations

"It's frozen. It really is frozen. Look at that! The small pot is also frozen. That's great!" Li Hehua and Yu Hongyan were in a daze. They held each other's hands and were extremely happy.

Xue Sifu excitedly turned around and punched Yifu, "Yifu, it's really frozen!"

Xue Yifu only gave an especially coy smile. He was clearly very happy.

Xue Yan also laughed. As long as the family was happy, he was happy.

Jiang Yue did not laugh. Instead, she went to find a piece of bamboo and scraped off the saltpeter crystals that had appeared on the ice.

At the bottom of the ice pot, there were a lot of saltpeter crystals.

The temperature of the water had dropped and the saltpeter's dissolution had dropped, causing the saltpeter crystals to form, then the bottom and the middle should be because too much saltpeter had been added. Before it could melt, the water had already frozen.