Chancellor of Qin who helped 秦始皇 unify China, made small seal script (小篆) the standard and proposed the burning of books in 213 BC. After the emperor died, 赵高 had him put to death.
Li Si helped Qin Shi Huang standardize the writing system.
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His memorial 《谏逐客书》 talked the king of Qin out of expelling foreign-born officials. Its line 泰山不让土壤,故能成其大, 'Mount Tai refuses no clod of earth, and so it grows great', is still quoted for welcoming talent.