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. Emperor Qin Shi Huang ordered the construction of the Great Wall in 221 BC. It is one of the most famous man-made structures in the world and a UNESCO World Heritage site.
Can we infer that 'The Great Wall of China has never been breached by invaders'? Yes, no, or maybe?