Suppose The Great Wall of China is one of the most famous landmarks in the world, stretching over 13,000 miles across northern China. Construction began over 2,000 years ago during the Qin Dynasty, with later additions and renovations made by different dynasties. It is a UNESCO World Heritage Site and a popular tourist destination.
Can we infer that "The Great Wall of China was built in one single phase by the Qin Dynasty."? Yes, no, or maybe?