Beside them, the two others were already drenched in sweat except for Xu Xin.
"Ugh... it's so hot. Let's cool down the treehouse," Li Wenxi said, wiping the sweat off her forehead.
"Ah..." Xu Xin suddenly remembered that the current temperature inside wasn't something they could endure for long.
No normal person could withstand a temperature of forty-five or forty-six degrees inside.
At this moment, the blue nitrate in the basin had completely crystallized into a powder.
As long as water was added, the surrounding temperature would drop.
Looking at the blue powder, Xu Xin suddenly had an idea.
He always used blue nitrate before. In his treehouse, the blue nitrate used for cooling was consumed very slowly; to this day, he hadn't completely used up a single piece of blue nitrate, not even one piece had noticeably shrunk, so this was his first time seeing the powder formed after blue nitrate dissolved.
If it's this powder...
