Analysis of information sources in references of the Wikipedia article "Printing" in English language version.
At the present time, the only known authoritative account of the invention of movable type by a commoner named Pi Sheng (c. 990–1051) is the contemporary record of Shen Kua (1031–[1095]) [...] Although the process went into eclipse after its inception, it was a complete invention and fully four hundred years ahead of Gutenberg.