mes from a foreign land, it is also called sweet potato. One mu (a unit of area) yields dozens of stones, which is twenty times more than rice. It can be eaten fresh or cooked. It can be boiled or gro...this point.He gritted his teeth and said, "It is indeed the heartfelt words of your humble servant! Your Highness may not like to hear it, but it is the truth.""Do you know what this palace finds most...