This kind of services is marked with yellow rectangle in Figure 4 and called shelf-ware services.
如图4所示，这类服务使用黄色矩形标识，并被称为shelf - ware服务。
2
The Yellow River Valley was one of the centers of China in the Shang and Zhou Dynasties as well as the most developed region in bronze ware decoration patterns in Spring and Autumn Period.