Suppose The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China. It was originally designed to protect the Chinese states and empires against the invasions and raids of nomadic groups, and has since become a symbol of Chinese strength and endurance.
Can we infer that "The Great Wall of China was primarily meant for decorative purposes"? Yes, no, or maybe?