Proto-writing
The early writing systems that emerged in Eurasia in the early 3rd millennium BC were not a sudden invention. Rather, they were a development based on earlier traditions of symbol systems that cannot be classified as writing proper, but have many characteristics strikingly similar to writing. These systems may be described as proto-writing. They used ideographic and/or early mnemonic symbols to convey information yet were probably devoid of direct linguistic content.
These systems emerged in the early Neolithic period, as early as the 7th millennium BC.
Neolithic
Neolithic China
In 2003, tortoise shells were found in 24 Neolithic graves excavated at Jiahu, Henan province, northern China, with radiocarbon dates from the 7th millennium BC. According to some archaeologists, the symbols carved on the shells had similarities to the late 2nd millennium BC oracle bone script. Others have dismissed this claim as insufficiently substantiated, claiming that simple geometric designs such as those found on the Jiahu shells cannot be linked to early writing.