Chapter 91: Papermaking Ice-Making Method

yao."You're just in time."Upon seeing Yang Lin, Li Yunyao took the initiative and said, “Yesterday on Black Wind Mountain, you mentioned the role of saltpeter and promised to explain it in detail late... as human shields! Very few conscripted civilians survived to return home...Seven or eight people is not a lot, but each one was raised by their parents. Knowing they were going to die, no one felt go...