#Hanzi, the characters of the Chinese #language, and their counterparts #Hanja (of the #Korea s), the #Kanji (of #Japan) and #ChuHan (of #Vietnam) were all used between the four nations (before Vietnam adopted a #Latin -based #script) to conduct trade in ancient times.
#China
The speech of all 4 are different; regardless, the #Hanzi had similar meaning. This made writing using the Hanzi/Hanja/Kanji/Chu Han a convenient lingua franca that circumvented the language barrier via an innate, shared writing system. Writing in Hanzi was still understood by all parties involved.