Seal Script, an ancient and revered branch of Chinese calligraphy, traces its origins back to the very inception of Chinese writing. While its formalization is often associated with the Qin Dynasty's unification around the 3rd century BCE, its roots extend much further into the past. The earliest forms of Seal Script can be seen in oracle bone inscriptions – a form of writing found on tortoise shells and cattle bones used for divination purposes. This early script, considered a precursor to Seal Script, laid the foundation for its subsequent development.