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... g stone wall.
The stone wall was covered with palm-sized iron rings, each only as thick as an index finger, and the parts used for wall connection could sway up and down.
Grabbing the first one, Gu Lan determined the load-bearing capacity of the iron ring. These rings could naturally be used for climbing, but stepping on them would cause them to bend.
So, this wall required precise control of foot force and arm strength, further testing the soldiers’ balance abilities. ...
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