High-tech guardians of the Great Wall at Shanhai Pass
From optical fibers buried in centuries-old bricks to algae "living armor" and robot dogs on patrol, cutting-edge tech is now safeguarding China's iconic Shanhai Pass section of the Great Wall.■
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From optical fibers buried in centuries-old bricks to algae "living armor" and robot dogs on patrol, cutting-edge tech is now safeguarding China's iconic Shanhai Pass section of the Great Wall.■