Please help me to see what is the cover of the first unit of this history book.

Polo, weapons and ritual vessels. Popular from Shang Dynasty to Warring States Period. The shotgun is a big axe, which is not only used in actual combat, but also a ceremonial appliance. The basic shape of graupel is rectangular or square, and some are crescent. There is a blade at one end and a nail or pin at the other end, which is used for binding or inserting wooden rafters. Because it is a ceremonial appliance, it is beautifully decorated. Some are decorated with human heads, some are carved with animal heads, and some are decorated with various animals.