Analysis of information sources in references of the Wikipedia article "History of writing" in English language version.
The seal impressions, from various tombs, date even further back, to 3400 B.C. These dates challenge the commonly held belief that early logographs, pictographic symbols representing a specific place, object, or quantity, first evolved into more complex phonetic symbols in Mesopotamia.
Although it was once thought that the idea of writing came to Egypt from Mesopotamia, recent discoveries indicate that writing arose first in Egypt.
Symbols carved into tortoise shells more than 8,000 years ago ... unearthed at a mass-burial site at Jiahu in the Henan Province of western China