Name: Before GPS, They Had the Genglubu
Uploaded: 2026-07-08T08:01:35+08:00
Duration: 3 min 5 s
Description: No GPS. No weather forecasts. For generations, Hainan fishermen relied on a handwritten manual to navigate reefs, avoid danger and find their way home.

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03:05

No GPS. No weather forecasts. For generations, Hainan fishermen relied on a handwritten manual to navigate reefs, avoid danger and find their way home. Known as the Genglubu, it was an unreadable code to outsiders – but to fishermen, it was the most valuable thing on board. Genglubu: Charting the South China Sea. Premieres July 9 on CGTN.

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