The Hidden Story - Secret History: New evidence rewrites the Great Wall of China's history, decodes its complex signals system and reveals the surprise ingredient that's kept it standing., 译文(2): 隐藏的故事-秘密的历史: 新的证据改写了中国的历史长城，解码了其复杂的信号系统，并揭示了令人惊讶的成分，使其保持立场。
