Suppose The Great Wall of China is the collective name of a series of fortification systems generally built across the historical northern borders of China to protect and consolidate territories of Chinese states and empires against various nomadic groups of the steppe and their polities. Several walls were being built from as early as the 7th century BC; these, later joined together and made bigger and stronger, are now collectively referred to as the Great Wall.
Can we infer that "The Great Wall of China was constructed in the 20th century."?