It covers the period from 1424 to 1867 .
It contains records , written entirely in Chinese , of communications between Ryukyu and ten different trading partners in this period , detailing as well the gifts given in tribute .
Covering the period from 1424 to 1867 , it contains records , written entirely in Chinese , of communications between Ryukyu and ten different trading partners in this period , detailing as well the gifts given in tribute .