What makes the Great Wall of China so extraordinary – Megan Campisi and Pen-Pen Chen Learn On Youtube TED-Ed — September 22, 2025 · Comments off Source Link archaeology China chinese history Chunqiu period Dunhuang Forced labor Fortification Great Wall Of China (Tourist Attraction) Han dynasty Liaodong Lintao Manchu People (Chinese Ethnic Group) Megan Campisi military Ming dynasty Mongolia Mongolian history Peasants Pen-Pen Chen Qin dynasty Qing dynasty Steff Lee tourism