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Copyright © 2024 CGTN. 京ICP备20000184号
Disinformation report hotline: 010-85061466
Using cutting-edge drone technology, a team of experts from Tianjin University have made a stunning discovery: over 200 doors, gateways and entrances hidden in the Ming Great Wall. What's more, one of these is a "tumen," a special type of hidden door designed by the philosopher Mozi thousands of years ago in the Spring and Autumn Period.