Old texts confirm islands sovereignty

A book about the notes Chinese fishermen kept to guide them in navigating the South China Sea was released in Hainan province on Friday.

The book, called South China Sea Genglubu and issued by Hainan Publishing House, tells the story of Genglubu, books Chinese fishermen used to keep notes about the routes they sailed in the South China Sea.

The notes, with information on the ocean currents and islands, were important to Chinese seamen in a time when there was no modern positioning technology.