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The construction crew uses nails to hold the structure together in some places, and bamboo rope in others—two methods that the ancient Chinese could have employed. To make rope pieces that are long enough for proper lashing, the team sets up a rope-making device. Previous Next NOVA Builds a Rainbow Bridge | Bridge the Gap | Nature's Miracle Material China's Age of Invention | Resources | Transcript Medieval Siege | Pharaoh's Obelisk | Easter Island | Roman Bath | China Bridge | Site Map Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated November 2000 |