Even if there was a huge block of ice inside, should it not have melted in half a month? Could it possibly be thousand-year-old ice dug from a snow mountain?
"Why not just open them up to see what's inside?" Lin Caisang looked interestedly at those grass nets, she suggested.
...
Before long, all the grass nets in the silkworm rooms were moved out.
When the grass nets were removed from the silkworm rooms, the temperatures began to rise thanks to the heat from the charcoal. The silkworm babies also started to have the energy to eat the mulberry leaves.
Meanwhile, in the yard, all the grass nets were piled up together. Several women started to untie the bundles to inspect them, revealing frosty, snow-white silkworm cocoons from within them.
"Ah, it's so cold."
Lin Caisang held one in her palm. It felt as if her palm was about to freeze, and she could not help but shiver from the cold.