Fu Nan Zhuan (An Account of Funan) by Kang Tai (the State of Wu in the Period of the Three Kingdoms)

In Fu Nan Zhuan, a book written by Kang Tai from the State of Wu during the Three Kingdoms Period (AD 220-265), there is the record that "in Zhanghai, to the corals shoal, there is Pangaea at the bottom of the shoal, upon which the corals grow", indicating that the South China Sea is rich in coral resources.