Here are some earlier writing systems:
* Cuneiform: Originated in ancient Mesopotamia around 3200 BCE.
* Egyptian hieroglyphs: Developed around 3200 BCE in ancient Egypt.
* Indus script: Found on seals and other artifacts from the Indus Valley Civilization, dating back to around 3000 BCE. While the script remains undeciphered, it is widely believed to represent a written language.
Therefore, while Chinese writing is incredibly ancient, it's not the absolute earliest.