Some pieces promote, or demote, to a piece that exists in the initial setup of the board. However, such a piece cannot then promote a second time as its namesake does. For example, a gold general promotes to a free gold. However, while a hook mover demotes to a gold general on its first capturing move, it does not promote to a free gold on its second. Rather, it remains a gold general for the rest of the game. This should be clear from the game equipment, for each piece only has two sides.