The Jiahu symbols are dated to around 6000 BC. Although at first a total of 16 signs were identified, intensive scrutiny has found there to be only 11 definitely incised signs, of which 9 were incised on tortoise shells and an additional 2 on bone.
The Jiahu glyphs are dated to approximately 6000 BC. Initially, a total of 16 characters were recognized, but thorough analysis revealed only 11 unmistakably carved signs, of which 9 were inscribed on turtle shells and an additional 2 on bone.