Suppose The Great Wall of China is a series of fortifications made of stones, bricks, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China. Construction of the wall began in the 7th century BC to protect the Chinese states and empires from invasions and raids by various nomadic groups.
Can we infer that "The Great Wall of China was built purely for decorative purposes."?