Recorded history
More complete writing systems were preceded by proto-writing. Early examples are the Jiahu symbols (c. 6600 BCE), Vinča signs (c. 5300 BCE), early Indus script (c. 3500 BCE) and Nsibidi script (c. before 500 CE). There is disagreement concerning exactly when prehistory becomes history, and when proto-writing became "true writing" However, invention of the first writing systems is roughly contemporary with the beginning of the Bronze Age in the late Neolithic of the late 4th millennium BCE. The Sumerian archaic cuneiform script and the Egyptian hieroglyphs are generally considered the earliest writing systems, both emerging out of their ancestral proto-literate symbol systems from 3400–3200 BCE with earliest coherent texts from about 2600 BCE.
Written Chinese
Chinese is one of the oldest continually used writing systems still in use. The earliest generally accepted examples of Chinese writing date back to the reign of the Shang Dynasty king Wu Ding (1250–1192 BC). These were divinatory inscriptions on oracle bones, primarily ox scapulae and turtle shells. Characters were carved on the bones in order to frame a question; the bones were then heated over a fire and the resulting cracks were interpreted to determine the answer. Such characters are called 甲骨文 "jiǎgǔwén" "shell-bone script" or oracle bone script.