C140 Visit to the printing house

Song Yao thought about what was going on with that seed as she cooked. Logically speaking, if it wasn't her or her master, only the young Song Gui would know about the seed. But why did Song Gui place the seed on the stove?

After all, he had not studied the seed successfully and was sure that he could plant it here, so it was confidential to the aunty who cooked it