Contributions
Believing in a highly bureaucratic system, Li Si is considered to have been central to the efficiency of the state of Qin and the success of its military conquest. He was also instrumental in systemizing standard measures and currency in post-unified China. He further helped systemize the written Chinese language by promulgating as the imperial standard the small seal script which had been in use in the state of Qin all along. In this process, variant graphs within the Qin script were proscribed, as were variant scripts from the different regions which had been conquered. This would have a unification effect on the Chinese culture for thousands of years.
Li Si was also the author of the Cangjie Pian (仓颉篇/倉頡篇), the first Chinese language primer of which fragments still exist.
Read more about this topic: Li Si